SB2025012016 - Use-after-free in Linux kernel block
Published: January 20, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025012016
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-2025-21631)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the bfq_waker_bfqq() function in block/bfq-iosched.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2550149fcdf2934155ff625d76ad4e3d4b25bbc6
- https://git.kernel.org/stable/c/bc2aeb35ff167e0c6b0cedf0c96a5c41e6cba1ed
- https://git.kernel.org/stable/c/be3eed59ac01f429ac10aaa46e26f653bcf581ab
- https://git.kernel.org/stable/c/fcede1f0a043ccefe9bc6ad57f12718e42f63f1d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.177
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.125
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.72