CVE-2026-22999CWE-416

CVE-2026-22999

High · published January 25, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
13.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00235 · 13.7th percentile
Weakness
CWE-416 · Use After Free
Published
2026-01-25T20:15Z
Affected products (11)
ProductVersionsFixed in
linux/linux_kernel≥ 3.8, < 5.10.2495.10.249
linux/linux_kernel≥ 5.11, < 5.15.1995.15.199
linux/linux_kernel≥ 5.16, < 6.1.1626.1.162
linux/linux_kernel≥ 6.2, < 6.6.1226.6.122
linux/linux_kernel≥ 6.7, < 6.12.676.12.67
linux/linux_kernel≥ 6.13, < 6.18.76.18.7
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (7)
https://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cd · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 25 JAN 14:36Z
    net/sched: sch_qfq: do not free existing class in qfq_change_class()
    cvelistv5