SB2026090577 - Memory leak in Linux kernel afs
Published: September 5, 2026
Security Bulletin ID
SB2026090577
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-80877)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a memory leak.
The vulnerability exists due to improper resource management in afs_update_cell() when processing a cell update with an empty server list. A local user can trigger processing of an empty server list during a cell update to cause a memory leak.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/13403945c2385653e282dacda304dce2a25fdb53
- https://git.kernel.org/stable/c/2b169eedbb96f37f3f33d7b496d8283194988980
- https://git.kernel.org/stable/c/8afb1a787a2802caf1895dd96745cfd6790a6f95
- https://git.kernel.org/stable/c/91d8f8e5fd34d3aed26f0fe6cf52b3f71de66cc6
- https://git.kernel.org/stable/c/bef5514f6b6cb4bed9061f4b628d6be1cf26a39e
- https://git.kernel.org/stable/c/bf55969d9188380eb539bd216850bac27bc2e272
- https://git.kernel.org/stable/c/fbfe75c81bff2359a03e85cf84293484cf60fcb9
- https://git.kernel.org/stable/c/fc10c0ecf06f2981af5d04357612b00051e03e9e