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Some fixes available 8 of 10
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Not affected | Not affected |
Some fixes available 12 of 13
A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary...
3 affected packages
grub2-unsigned, grub2-signed, grub2
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2 | Not affected | Not affected | Not affected | Not affected |
Some fixes available 10 of 12
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed |
Some fixes available 10 of 12
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed |
Some fixes available 10 of 12
There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed |
Some fixes available 10 of 12
In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed |
Some fixes available 10 of 13
A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed |
A flaw was found in the grub2-set-bootflag utility of grub2. A local attacker could run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system...
1 affected package
grub2
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | — | — | — | Not affected |
The grub_ext2_read_block function in fs/ext2.c in GNU GRUB before 2013-11-12, as used in shlr/grub/fs/ext2.c in radare2 1.5.0, allows remote attackers to cause a denial of service (excessive stack use and application crash) via a...
2 affected packages
radare2, grub2
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| radare2 | Not affected | Not in release | Not affected | Not affected |
| grub2 | Not affected | Not affected | Not affected | Not affected |
Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1)...
1 affected package
grub2
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS |
|---|---|---|---|---|
| grub2 | — | — | — | — |