CVE-2015-8709

kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.

From the Ubuntu Security Team

Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
linux	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Not affected
	16.10 yakkety	Fixed 4.8.0-28.30
	16.04 LTS xenial	Fixed 4.4.0-51.72
	15.10 wily	Fixed 4.2.0-22.27
	15.04 vivid	Fixed 3.19.0-75.83
	14.04 LTS trusty	Fixed 3.13.0-103.150
	12.04 LTS precise	Not affected
linux-armadaxp	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-aws	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not in release
linux-flo	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Not in release
	15.10 wily	Ignored end of life
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-gke	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Ignored end of kernel support
	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-goldfish	17.10 artful	Not in release
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Not in release
	15.10 wily	Ignored end of life
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-grouper	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-hwe	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Ignored replaced by linux-hwe-5.4
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-hwe-edge	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Ignored superseded by linux-hwe-5.4
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-linaro-omap	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-linaro-shared	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-linaro-vexpress	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-lts-quantal	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-lts-raring	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-lts-saucy	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-lts-trusty	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Fixed 3.13.0-103.150~precise1
linux-lts-utopic	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Fixed 3.16.0-57.77~14.04.1
	12.04 LTS precise	Not in release
linux-lts-vivid	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Fixed 3.19.0-75.83~14.04.1
	12.04 LTS precise	Not in release
linux-lts-wily	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Fixed 4.2.0-22.27~14.04.1
	12.04 LTS precise	Not in release
linux-lts-xenial	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Fixed 4.4.0-51.72~14.04.1
	12.04 LTS precise	Not in release
linux-maguro	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-mako	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Not in release
	15.10 wily	Ignored end of life
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-manta	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Ignored end of life
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-qcm-msm	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life
linux-raspi2	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Ignored replaced by linux-raspi
	18.04 LTS bionic	Ignored end of standard support
	17.10 artful	Not affected
	17.04 zesty	Not affected
	16.10 yakkety	Fixed 4.8.0-1021.24
	16.04 LTS xenial	Fixed 4.4.0-1038.45
	15.10 wily	Fixed 4.2.0-1017.24
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-snapdragon	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Ignored end of standard support
	17.10 artful	Not affected
	17.04 zesty	Not affected
	16.10 yakkety	Fixed 4.4.0-1046.50
	16.04 LTS xenial	Fixed 4.4.0-1042.46
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
linux-ti-omap4	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not affected
linux-hwe-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-hwe-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-hwe-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-hwe-6.11	25.04 plucky	Not in release
	24.04 LTS noble	Ignored superseded by linux-hwe-6.14, was needs-triage
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-hwe-6.14	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-kvm	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
linux-aws-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-aws-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-aws-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-aws-6.14	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-aws-hwe	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
linux-azure	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Ignored superseded by linux-azure-5.3
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
linux-azure-4.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-6.11	25.04 plucky	Not in release
	24.04 LTS noble	Ignored superseded by linux-azure-6.14, was needs-triage
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-fde	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Ignored superseded by linux-azure-fde-5.15
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-fde-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Ignored ESM criteria, was needed
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-nvidia	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-bluefield	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-fips	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
linux-aws-fips	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-azure-fips	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp-fips	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Ignored superseded by linux-gcp-5.3
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
linux-gcp-4.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp-6.11	25.04 plucky	Not in release
	24.04 LTS noble	Ignored superseded by linux-gcp-6.14, was needs-triage
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gcp-6.14	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-gkeop	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Ignored end of kernel support
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-ibm	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-ibm-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-ibm-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-ibm-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-intel	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-intel-iotg	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-intel-iotg-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-iot	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-intel-iot-realtime	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-lowlatency	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-lowlatency-hwe-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-lowlatency-hwe-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-lowlatency-hwe-6.11	25.04 plucky	Not in release
	24.04 LTS noble	Ignored replaced by linux-hwe-6.14, was needs-triage
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia-lowlatency	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia-tegra	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia-tegra-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia-tegra-igx	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oracle	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
linux-oracle-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oracle-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oracle-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oracle-6.14	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oem-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oem-6.11	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-oem-6.14	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-raspi	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-raspi-5.4	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-raspi-realtime	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-realtime	25.04 plucky	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-riscv	25.04 plucky	Not affected
	24.04 LTS noble	Ignored replaced by linux-riscv-6.14
	22.04 LTS jammy	Ignored end of kernel support
	20.04 LTS focal	Ignored superseded by linux-riscv-5.8
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-riscv-5.15	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-riscv-6.8	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-riscv-6.14	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-xilinx-zynqmp	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
linux-nvidia-6.11	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Notes

sbeattie

published fix has been reverted and replaced by upstream commit. Published kernels are not vulnerable to this, the status is tracking the state of the replaced commit coming through the trees.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
linux	Introduced by 1da177e, fixed by bfedb58

Severity score breakdown

Parameter	Value
Base score	7.0 · High
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-2853-1
Linux kernel (Wily HWE) vulnerabilities
20 December 2015

USN-2851-1
Linux kernel vulnerabilities
19 December 2015

USN-2848-1
Linux kernel vulnerabilities
19 December 2015

USN-2849-1
Linux kernel (Utopic HWE) vulnerabilities
19 December 2015

USN-2854-1
Linux kernel (Vivid HWE) vulnerabilities
20 December 2015

USN-2850-1
Linux kernel vulnerabilities
19 December 2015

USN-2847-1
Linux kernel (Trusty HWE) vulnerabilities
19 December 2015

USN-2852-1
Linux kernel (Raspberry Pi 2) vulnerability
19 December 2015

Cvss 3 Severity Score