ZDI-26-700: Linux Kernel QFQ Plus Scheduler Use-After-Free Local Privilege Escalation Vulnerability
ZDI discloses Linux Kernel QFQ Plus scheduler use-after-free (CVE-2026-22999, CVSS 7.8) enabling local privilege escalation on affected systems.
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CVE-2026-22999
- CVSS 3.1
- 5.5 medium
- EPSS
- <1%p11
- Published
- ·
- Modified
Description · NVD
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: do not free existing class in qfq_change_class() Fixes qfq_change_class() error case. cl->qdisc and cl should only be freed if a new class and qdisc were allocated, or we risk various UAF.