SB2026011421 - Use-after-free in Linux kernel sched
Published: January 14, 2026
Security Bulletin ID
SB2026011421
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-2025-71066)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ets_qdisc_change() function in net/sched/sch_ets.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/06bfb66a7c8b45e3fed01351a4b087410ae5ef39
- https://git.kernel.org/stable/c/45466141da3c98a0c5fa88be0bc14b4b6a4bd75c
- https://git.kernel.org/stable/c/9987cda315c08f63a02423fa2f9a1f6602c861a0
- https://git.kernel.org/stable/c/a75d617a4ef08682f5cfaadc01d5141c87e019c9
- https://git.kernel.org/stable/c/ce052b9402e461a9aded599f5b47e76bc727f7de