CVE-2026-23083

linux: In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOU_ATTR_IPPROTO

CVE-2026-23083 is fixed in 95 products on 1 platform, first by DEBIAN-CVE-2026-23083, released February 4, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.8
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
4th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
bpftool-debuginfo · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
bpftool6.12 · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
bpftool6.12-debuginfo · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
dtb-aarch64 · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-64kb · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-64kb · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-64kb · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-azure · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-azure · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-azure · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-debuginfo · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-debuginfo-common-aarch64 · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-debuginfo-common-x86_64 · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-default · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-default · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-default · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-default-base · opensuse-leap 16.0 6.12.0-160000.27.1.160000.2.8 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-default-base · sles 15.7 6.4.0-150700.53.34.1.150700.17.23.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-default-base · sles 16.0 6.12.0-160000.27.1.160000.2.8 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-devel · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-docs · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-docs · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-docs · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-headers · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-kvmsmall · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-kvmsmall · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-libbpf · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-libbpf-debuginfo · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-libbpf-devel · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-libbpf-static · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-livepatch-6.1.163-186.299 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-livepatch-6.12.68-92.122 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel-livepatch-SLE15-SP7-RT_Update_10 · sles 15.7 1-150700.1.3.1 SUSE-SU-2026:0962-1 Mar 23, 2026
kernel-livepatch-SLE15-SP7_Update_10 · sles 15.7 1-150700.15.3.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-modules-extra · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-modules-extra-common · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-obs-build · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-obs-build · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-obs-qa · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-obs-qa · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-rt · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-source · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-source · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-source · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-syms · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-syms · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-syms · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel-tools · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-tools-debuginfo · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-tools-devel · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
kernel-uek · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-core · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-core · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-core · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-core · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-devel · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-devel · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-core · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-core · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-deprecated · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-deprecated · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-desktop · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-desktop · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-extra · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-extra · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-extra-netfilter · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-extra-netfilter · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-usb · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-usb · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-wireless · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-debug-modules-wireless · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-devel · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-devel · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-doc · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-doc · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-core · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-core · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-deprecated · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-deprecated · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-desktop · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-desktop · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-extra · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-extra · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-extra-netfilter · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-extra-netfilter · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-usb · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-usb · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-wireless · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-modules-wireless · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-tools · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek-tools · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-core · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-core · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-devel · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-devel · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-core · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-core · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-deprecated · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-deprecated · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-desktop · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-desktop · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-extra · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-extra · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-extra-netfilter · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-extra-netfilter · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-usb · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-usb · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-wireless · ol 10 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-uek64k-modules-wireless · ol 9 0:6.12.0-200.74.27.el9uek ELSA-2026-50160 Mar 20, 2026
kernel-zfcpdump · opensuse-leap 16.0 6.12.0-160000.27.1 OPENSUSE-SU-2026:20416-1 Mar 25, 2026
kernel-zfcpdump · sles 15.7 6.4.0-150700.53.34.1 SUSE-SU-2026:1081-1 Mar 26, 2026
kernel-zfcpdump · sles 16.0 6.12.0-160000.27.1 SUSE-SU-2026:20931-1 Mar 25, 2026
kernel6.12 · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-debuginfo · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-debuginfo-common-aarch64 · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-debuginfo-common-x86_64 · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-devel · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-headers · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-libbpf · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-libbpf-debuginfo · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-libbpf-devel · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-libbpf-static · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-modules-extra · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-modules-extra-common · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-tools · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-tools-debuginfo · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
kernel6.12-tools-devel · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
linux · Debian 12.15 (bookworm) 6.1.162-1 DEBIAN-CVE-2026-23083 Feb 4, 2026
linux · Debian 13.5 (trixie) 6.12.69-1 DEBIAN-CVE-2026-23083 Feb 4, 2026
linux · Debian 14 6.18.8-1 DEBIAN-CVE-2026-23083 Feb 4, 2026
perf · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
perf-debuginfo · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
perf6.12 · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
perf6.12-debuginfo · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
python3-perf · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
python3-perf-debuginfo · amzn 2023 1:6.1.163-186.299.amzn2023 ALAS2023-2026-1468 Mar 2, 2026
python3-perf6.12 · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026
python3-perf6.12-debuginfo · amzn 2023 1:6.12.68-92.122.amzn2023 ALAS2023-2026-1455 Mar 2, 2026

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