SB20251230170 - Use-after-free in Linux kernel sched
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230170
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2023-54193)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the tcf_block_bind() function in net/sched/cls_api.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/26aec72429a05e917d574eca0efc5306c63a8862
- https://git.kernel.org/stable/c/55866fe3fded3ce94ac3fc1bb3dfce654282f483
- https://git.kernel.org/stable/c/7311c8be3755611bf6edea4dfbeb190b4bdd489f
- https://git.kernel.org/stable/c/7b7a74ed303d532fb73ae4b1697f16a0fea89cd0
- https://git.kernel.org/stable/c/cb145932fcf6814e7e95e467eb70e7849a845ae9
- https://git.kernel.org/stable/c/cc5fe387c6294d0471cb7ed064efac97fac65ccc
- https://git.kernel.org/stable/c/da94a7781fc3c92e7df7832bc2746f4d39bc624e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.180
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.112
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.243
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.29
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4