SB20251230249 - Improper locking in Linux kernel rcu
Published: December 30, 2025 Updated: December 30, 2025
Security Bulletin ID
SB20251230249
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-2023-54316)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ref_scale_init() function in kernel/rcu/refscale.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/066fbd8bc981cf49923bf828b7b4092894df577f
- https://git.kernel.org/stable/c/70a2856fd1d0a040c876ba9e3f89b949ae92e4dd
- https://git.kernel.org/stable/c/e0322a255a2242dbe4686b6176b3c83dea490529
- https://git.kernel.org/stable/c/e5de968a9032366198720eac4f368ed7e690b3ef
- https://git.kernel.org/stable/c/ec9d118ad99dc6f1bc674c1e649c25533d89b9ba
- https://git.kernel.org/stable/c/f5063e8948dad7f31adb007284a5d5038ae31bb8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.195
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.132
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.53
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6