SB20250916112 - Use-after-free in Linux kernel block
Published: September 16, 2025 Updated: September 22, 2025
Security Bulletin ID
SB20250916112
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-2022-50329)
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_exit_icq_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/1425f1bb5df5239021fd09ebc2a5e8070e705d36
- https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678
- https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02
- https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f
- https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.17