SB2026012213 - NULL pointer dereference in Linux kernel sched
Published: January 22, 2026
Security Bulletin ID
SB2026012213
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-22976)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the qfq_reset_qdisc() function in net/sched/sch_qfq.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0809c4bc06c9c961222df29f2eccfd449304056f
- https://git.kernel.org/stable/c/11bf9134613f6c71fc0ff36c5d8d33856f6ae3bb
- https://git.kernel.org/stable/c/43497313d0da3e12b5cfcd97aa17bf48ee663f95
- https://git.kernel.org/stable/c/51ffd447bc37bf1a5776b85523f51d2bc69977f6
- https://git.kernel.org/stable/c/6116a83ec167d3ab1390cded854d237481f41b63
- https://git.kernel.org/stable/c/c1d73b1480235731e35c81df70b08f4714a7d095
- https://git.kernel.org/stable/c/cdb24200b043438a144df501f1ebbd926bb1a2c7