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
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 10%
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
6.1.170-3
fixed
bookworm (security)
6.1.176-1
fixed
bullseye
vulnerable
bullseye (security)
5.10.259-1
fixed
forky
7.0.13-1
fixed
sid
7.1.3-1
fixed
trixie
6.12.86-1
fixed
trixie (security)
6.12.95-1
fixed
linux-6.1
bullseye (security)
6.1.176-1~deb11u1
fixed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
cluster-md-kmp-default
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
dlm-kmp-default
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
gfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
kernel-64kb
suse enterprise desktop 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.31.1
fixed
kernel-azure
suse enterprise sap 15 SP7
6.4.0-150700.20.27.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.20.27.1
fixed
kernel-default
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
kernel-default-base
suse enterprise desktop 15 SP7
6.4.0-150700.53.31.1.150700.17.21.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.31.1.150700.17.21.1
fixed
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1.150400.24.98.3
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1.150500.6.67.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1.150600.12.40.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.31.1.150700.17.21.1
fixed
kernel-default-man
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
kernel-obs-build
suse enterprise desktop 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.31.1
fixed
kernel-source
suse enterprise desktop 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.31.1
fixed
kernel-source-azure
suse enterprise sap 15 SP7
6.4.0-150700.20.27.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.20.27.1
fixed
kernel-zfcpdump
suse enterprise desktop 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.31.1
fixed
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.31.1
fixed
ocfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.293.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
reiserfs-kmp-default
suse enterprise server 15 SP4
5.14.21-150400.24.194.1
fixed
suse enterprise server 15 SP5
5.14.21-150500.55.136.1
fixed
suse enterprise server 15 SP6
6.4.0-150600.23.87.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
bpftool
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
bpftool-debuginfo
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
bpftool6.12
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
bpftool6.12-debuginfo
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-debuginfo
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-debuginfo-common-aarch64
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-debuginfo-common-x86_64
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-devel
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-headers
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-libbpf
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-libbpf-debuginfo
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-libbpf-devel
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-libbpf-static
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-livepatch-6.1.163-186.299
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.12.68-92.122
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-modules-extra
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-modules-extra-common
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-tools
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-tools-debuginfo
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel-tools-devel
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
kernel6.12
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-debuginfo
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-debuginfo-common-aarch64
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-debuginfo-common-x86_64
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-devel
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-headers
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-libbpf
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-libbpf-debuginfo
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-libbpf-devel
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-libbpf-static
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-modules-extra
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-modules-extra-common
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-tools
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-tools-debuginfo
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
kernel6.12-tools-devel
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
perf
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
perf-debuginfo
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
perf6.12
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
perf6.12-debuginfo
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
python3-perf
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
python3-perf-debuginfo
Amazon Linux 2023
1:6.1.163-186.299.amzn2023
fixed
python3-perf6.12
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
python3-perf6.12-debuginfo
Amazon Linux 2023
1:6.12.68-92.122.amzn2023
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
kernel
Azure Linux 3.0
0:6.6.126.1-1.azl3
fixed
CBL-Mariner 2.0
0:5.15.200.1-1.cm2
fixed
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