CVE-2026-22976

A flaw was found in the Linux kernel's schqfq Quick Fair Queueing scheduler. This vulnerability allows a local user to trigger a NULL pointer dereference in the qfqreset function. The issue arises when multiple qfqclass objects incorrectly reference the same leafqdisc, leading to an attempt to...

CVE-2026-22976 net/sched: sch_qfq: Fix NULL deref when deactivating inactive aggregate in qfq_reset

In the Linux kernel, the following vulnerability has been resolved: net/sched: schqfq: Fix NULL deref when deactivating inactive aggregate in qfqreset qfqclass-leafqdisc-q.qlen 0 does not imply that the class itself is active. Two qfqclass objects may point to the same leafqdisc. This happens whe...

PT-2026-3755

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw in the sch qfq module related to how it handles deactivation of inactive aggregates during a reset operation. Specifically, a NULL dereference can occur ...