CVE-2026-23083

EUVD-2026-5459
In the Linux kernel, the following vulnerability has been resolved:

fou: Don't allow 0 for FOU_ATTR_IPPROTO.

fou_udp_recv() has the same problem mentioned in the previous
patch.

If FOU_ATTR_IPPROTO is set to 0, skb is not freed by
fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu().

Let's forbid 0 for FOU_ATTR_IPPROTO.
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: 2%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
3.18 ≤
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
< 6.12.68
linuxlinux_kernel
6.13 ≤
𝑥
< 6.18.8
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
linuxlinux_kernel
6.19:rc6
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)
6.12.94-1
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
4.12.14-122.296.1
fixed
dlm-kmp-default
suse enterprise server 12 SP5
4.12.14-122.296.1
fixed
gfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.296.1
fixed
kernel-64kb
suse enterprise desktop 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.34.1
fixed
kernel-default
suse enterprise desktop 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise server 12 SP5
4.12.14-122.296.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.34.1
fixed
kernel-default-base
suse enterprise desktop 15 SP7
6.4.0-150700.53.34.1.150700.17.23.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.34.1.150700.17.23.1
fixed
suse enterprise server 12 SP5
4.12.14-122.296.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.34.1.150700.17.23.1
fixed
kernel-default-man
suse enterprise server 12 SP5
4.12.14-122.296.1
fixed
kernel-obs-build
suse enterprise desktop 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.34.1
fixed
kernel-source
suse enterprise desktop 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise server 12 SP5
4.12.14-122.296.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.34.1
fixed
kernel-zfcpdump
suse enterprise desktop 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.34.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.34.1
fixed
ocfs2-kmp-default
suse enterprise server 12 SP5
4.12.14-122.296.1
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
References
https://git.kernel.org/stable/c/1cc98b8887cabb1808d2f4a37cd10a7be7574771
https://git.kernel.org/stable/c/611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea
https://git.kernel.org/stable/c/6e983789b7588ee59cbf303583546c043bad8e19
https://git.kernel.org/stable/c/7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5
https://git.kernel.org/stable/c/9b75dff8446ec871030d8daf5a69e74f5fe8b956
https://git.kernel.org/stable/c/b7db31a52c3862a1a32202a273a4c32e7f5f4823
https://git.kernel.org/stable/c/c7498f9bc390479ccfad7c7f2332237ff4945b03