SB20250916217 - Improper locking in Linux kernel kcm
Published: September 16, 2025 Updated: September 22, 2025
Security Bulletin ID
SB20250916217
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 security vulnerability.
1) Improper locking (CVE-ID: CVE-2022-50265)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the kcm_rcv_ready(), kcm_rfree(), requeue_rx_msgs(), reserve_rx_kcm(), kcm_recv_disable() and kcm_done() functions in net/kcm/kcmsock.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/0c745b5141a45a076f1cb9772a399f7ebcb0948a
- https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a
- https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9
- https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d
- https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635
- https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924
- https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df
- https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.264