CVE-2024-26461

Publication date 29 February 2024

Last updated 19 August 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/lib/gssapi/krb5/k5sealv3.c.

Read the notes from the security team

Why is this CVE low priority?

memory leak only unlikely to be triggered

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
krb5	25.10 questing	Fixed 1.21.3-4ubuntu2
	25.04 plucky	Fixed 1.21.3-4ubuntu2
	24.10 oracular	Fixed 1.21.3-3ubuntu0.2
	24.04 LTS noble	Fixed 1.20.1-6ubuntu2.5
	23.10 mantic	Ignored end of life, was needed
	22.04 LTS jammy	Fixed 1.19.2-2ubuntu0.6
	20.04 LTS focal	Fixed 1.17-6ubuntu4.9
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Vulnerable

Notes

mdeslaur

per upstream: "The k5sealv3.c leak affects an encoding function, and happens on a bounds check which likely cannot be triggered with any choice of memory-valid API inputs. (The bounds check was itself introduced to quash a different static analysis defect.)" same commit as CVE-2024-26458

Patch details

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

Package	Patch details
krb5	Upstream: c5f9c81

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-7314-1
Kerberos vulnerabilities
3 March 2025