CVE-2026-22999

EUVD-2026-4624
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
3.8 ≤
𝑥
< 5.10.249
linuxlinux_kernel
5.11 ≤
𝑥
< 5.15.199
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.162
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.122
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.67
linuxlinux_kernel
6.13 ≤
𝑥
< 6.18.7
linuxlinux_kernel
6.19:rc1
linuxlinux_kernel
6.19:rc2
linuxlinux_kernel
6.19:rc3
linuxlinux_kernel
6.19:rc4
linuxlinux_kernel
6.19:rc5
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
vulnerable
bookworm (security)
6.1.164-1
fixed
bullseye
vulnerable
bullseye (security)
5.10.251-1
fixed
forky
6.19.10-1
fixed
sid
6.19.10-1
fixed
trixie
6.12.73-1
fixed
trixie (security)
6.12.74-2
fixed
linux-6.1
bullseye (security)
6.1.164-1~deb11u1
fixed
Vulnerability Media Exposure
References
https://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160
https://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e
https://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50
https://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78
https://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363
https://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cd
https://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf