CVE-2026-22999
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJan 25, 2026
First seenJan 25, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.8 ≤ v < 5.10.249, 5.11 ≤ v < 5.15.199, 5.16 ≤ v < 6.1.162, 6.2 ≤ v < 6.6.122, 6.7 ≤ v < 6.12.67, 6.13 ≤ v < 6.18.7, 6.19 | 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 |
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