SB20251230118 - Memory leak in Linux kernel cifs
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230118
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2022-50856)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the cifs_ses_add_channel() function in fs/cifs/sess.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/7286f875510486fdc2fc426b7c826262e2283a65
- https://git.kernel.org/stable/c/847301f0ee1c29f34cc48547ce1071990f24969c
- https://git.kernel.org/stable/c/db2a8b6c17e128d91f35d836c569f4a6bda4471b
- https://git.kernel.org/stable/c/e909d054bdea75ef1ec48c18c5936affdaecbb2c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.152
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.76
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1