Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.8, < 5.10.249 |
References
- https://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160Patch
- https://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90ePatch
- https://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50Patch
- https://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78Patch
- https://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363Patch
- https://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cdPatch
- https://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddfPatch
FAQ
What is CVE-2026-22999?
CVE-2026-22999 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2026-22999?
CVE-2026-22999 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-22999?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.