SB20250520136 - Use-after-free in Linux kernel sched
Published: May 20, 2025 Updated: May 21, 2025
Security Bulletin ID
SB20250520136
CSH 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 vulnerability.
1) Use-after-free (CVE-ID: CVE-2025-37913)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the cl_is_active() and qfq_enqueue() functions in net/sched/sch_qfq.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0aa23e0856b7cedb3c88d8e3d281c212c7e4fbeb
- https://git.kernel.org/stable/c/0bf32d6fb1fcbf841bb9945570e0e2a70072c00f
- https://git.kernel.org/stable/c/370218e8ce711684acc4cdd3cc3c6dd7956bc165
- https://git.kernel.org/stable/c/53bc0b55178bd59bdd4bcd16349505cabf54b1a2
- https://git.kernel.org/stable/c/a43783119e01849fbf2fe8855634e8989b240cb4
- https://git.kernel.org/stable/c/f139f37dcdf34b67f5bf92bc8e0f7f6b3ac63aa4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.182
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.138
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.28
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.90