SB2025100479 - Use-after-free in Linux kernel block
Published: October 4, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100479
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-2022-50488)
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_put_stable_ref() and bfq_exit_icq_bfqq() functions 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/094f3d9314d67691cb21ba091c1b528f6e3c4893
- https://git.kernel.org/stable/c/5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a
- https://git.kernel.org/stable/c/64dc8c732f5c2b406cc752e6aaa1bd5471159cab
- https://git.kernel.org/stable/c/761564d93c8265f65543acf0a576b32d66bfa26a
- https://git.kernel.org/stable/c/b22fd72bfebda3956efc4431b60ddfc0a51e03e0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.16