medium 5.3

CVE-2022-2663 json

An issue was found in the Linux kernel in nf_conntrack_irc where the message handling can be confused and incorrectly matches the message.

published 2022-09-01 4y ago modified 2026-10-14 26d ago also EUVD-2022-34909

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.1%; EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits: 0; none known

An issue was found in the Linux kernel in nf_conntrack_irc where the message handling can be confused and incorrectly matches the message. A firewall may be able to be bypassed when users are using unencrypted IRC with nf_conntrack_irc configured.

Patch / fix

fixed in 1 distros 6

Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem V1.1

debian ubuntu red hat suse almalinux arch linux

linux Debian 14, Debian 13, Debian 12 6.0.2-1

debian advisories DEBIAN-CVE-2022-2663

linux Ubuntu 18.04 LTS 4.15.0-204.215
linux Ubuntu 20.04 LTS 5.4.0-136.153
linux Ubuntu 22.04 LTS 5.15.0-57.63
linux-aws Ubuntu 18.04 LTS 4.15.0-1150.163
linux-aws Ubuntu 20.04 LTS 5.4.0-1093.101
linux-aws Ubuntu 22.04 LTS 5.15.0-1027.31
linux-gcp Ubuntu 20.04 LTS 5.4.0-1097.106
linux-gcp Ubuntu 22.04 LTS 5.15.0-1026.33

ubuntu advisories UBUNTU-CVE-2022-2663

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

perf rhev hypervisor 4.4, RHEL 8.6 EUS 4.18.0-372.91.1.el8_6
kernel RHEL 9 5.14.0-284.11.1.el9_2
perf RHEL 9 5.14.0-284.11.1.el9_2
rtla RHEL 9 5.14.0-284.11.1.el9_2
bpftool RHEL 9 7.0.0-284.11.1.el9_2
kernel-64k RHEL 9 5.14.0-284.11.1.el9_2
kernel-core RHEL 9 5.14.0-284.11.1.el9_2
kernel-tools RHEL 9 5.14.0-284.11.1.el9_2

red hat advisories RHSA-2024:0724 RHSA-2023:2458 RHSA-2023:2148 RHSA-2023:2736 RHSA-2023:2951

kernel-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
kernel-syms-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
kernel-rt_debug Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
kernel-source-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
kernel-syms SLES 12 SP3-BCL 4.4.180-94.182.1
kernel-source SLES 12 SP3-BCL 4.4.180-94.182.1
kernel-default SLES 12 SP3-BCL 4.4.180-94.182.1
kernel-syms SLES 12 SP2-BCL 4.4.121-92.196.2

suse advisories SUSE-SU-2023:0416-1 SUSE-SU-2022:4617-1 SUSE-SU-2022:4611-1 SUSE-SU-2022:4561-1 SUSE-SU-2022:3809-1 SUSE-SU-2022:3609-1

kernel-rt AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-kvm AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-core AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-modules AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-debug-kvm AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-debug-core AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-debug-modules AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
kernel-rt-modules-extra AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8

almalinux advisories ALSA-2023:2736 ALSA-2023:2951 ALSA-2023:2148 ALSA-2023:2458

linux-lts Arch Linux 6.2-1
linux-hardened Arch Linux 6.2-1
linux-zen Arch Linux 6.2-1
linux Arch Linux 6.2-1

arch linux advisories AVG-2834 AVG-2835 AVG-2836 AVG-2837

Is CVE-2022-2663 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-2663 updated 2026-11-05 cvss 5.3

kernel: netfilter: nf_conntrack_irc message handling issue

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
affected: workaround, no fix planned “Out of support scope”
Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.91.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.91.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.91.1.el8_6
fixed: vendor fix RHSA-2024:0724
Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-284.11.1.el9_2, rtla 5.14.0-284.11.1.el9_2, kernel-devel-matched 5.14.0-284.11.1.el9_2, kernel-64k-devel-matched 5.14.0-284.11.1.el9_2, kernel-debug-devel-matched 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.11.1.el9_2, +5 more
fixed: vendor fix RHSA-2023:2458
Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-477.10.1.el8_8, kernel 4.18.0-477.10.1.el8_8, bpftool 4.18.0-477.10.1.el8_8, kernel-core 4.18.0-477.10.1.el8_8, kernel-tools 4.18.0-477.10.1.el8_8, python3-perf 4.18.0-477.10.1.el8_8, +15 more
fixed: vendor fix RHSA-2023:2951
Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.0.0-284.11.1.el9_2, kernel 5.14.0-284.11.1.el9_2, kernel-64k 5.14.0-284.11.1.el9_2, kernel-core 5.14.0-284.11.1.el9_2, kernel-tools 5.14.0-284.11.1.el9_2, python3-perf 5.14.0-284.11.1.el9_2, +28 more
fixed: vendor fix RHSA-2023:2458
Red Hat Enterprise Linux BaseOS EUS (v.8.6) perf 4.18.0-372.91.1.el8_6, kernel 4.18.0-372.91.1.el8_6, bpftool 4.18.0-372.91.1.el8_6, kernel-core 4.18.0-372.91.1.el8_6, kernel-tools 4.18.0-372.91.1.el8_6, python3-perf 4.18.0-372.91.1.el8_6, +15 more
fixed: vendor fix RHSA-2024:0724
Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-477.10.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.10.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.10.1.el8_8
fixed: vendor fix RHSA-2023:2951
Red Hat Enterprise Linux CRB (v. 9) kernel-debuginfo-common-s390x 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.11.1.el9_2
fixed: vendor fix RHSA-2023:2458

show 5 more

Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-kvm 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-modules 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-kvm 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-core 4.18.0-477.10.1.rt7.274.el8_8, +4 more
fixed: vendor fix RHSA-2023:2736
Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-kvm 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-modules 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-kvm 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-core 5.14.0-284.11.1.rt14.296.el9_2, +6 more
fixed: vendor fix RHSA-2023:2148
Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-modules 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-core 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-modules 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-modules-extra 4.18.0-477.10.1.rt7.274.el8_8, +2 more
fixed: vendor fix RHSA-2023:2736
Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-modules 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-modules-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-modules 5.14.0-284.11.1.rt14.296.el9_2, +4 more
fixed: vendor fix RHSA-2023:2148
Red Hat Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.91.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.91.1.el8_6
fixed: vendor fix RHSA-2024:0724

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-25-044-09 updated 2025-05-06 cvss 5.3

Siemens SCALANCE W700 IEEE 802.11ax

Siemens SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) <V3.0.0 Siemens SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) <V3.0.0 Siemens SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0) <V3.0.0 Siemens SCALANCE WAM763-1 (US) (6GK5763-1AL00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) <V3.0.0 Siemens SCALANCE WAM766-1 (ME) (6GK5766-1GE00-7DC0) <V3.0.0

+13 more productsfewer

Siemens SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (ME) (6GK5766-1GE00-7TC0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) <V3.0.0 Siemens SCALANCE WUB762-1 (6GK5762-1AJ00-1AA0) <V3.0.0 Siemens SCALANCE WUB762-1 iFeatures (6GK5762-1AJ00-2AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3AB0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3DB0) <V3.0.0 Siemens SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) <V3.0.0 Siemens SCALANCE WUM766-1 (ME) (6GK5766-1GE00-3DC0) <V3.0.0 Siemens SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) <V3.0.0

affected: fixed in V3.0.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-166-11 updated 2024-04-09 cvss 5.3

Siemens SIMATIC S7-1500 TM MFP Linux Kernel

Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem <V1.1
affected: fixed in V1.1, workaround support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

4.07% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

dgl.cx https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663 referenced PoC, tagged "exploit" by a source, unverified
youtube.com https://www.youtube.com/watch?v=WIq-YgQuYCA referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

n/a Linux kernel
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness

CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

Technology feeds

Linux kernel rss critical rss

References

dgl.cx /2022/08/nat-again-irc-cve-2022-2663
exploit, third-party-advisory
youtube.com /watch?v=WIq-YgQuYCA
exploit, third-party-advisory
debian.org /security/2022/dsa-5257
vendor-advisory, third-party-advisory
openwall.com /lists/oss-security/2022/08/30/1
mailing-list, third-party-advisory
lore.kernel.org /netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/
lists.debian.org /debian-lts-announce/2022/10/msg00000.html
mailing-list, third-party-advisory
lists.debian.org /debian-lts-announce/2022/11/msg00001.html
mailing-list, third-party-advisory
cert-portal.siemens.com /productcert/html/ssa-794697.html
cert-portal.siemens.com /productcert/html/ssa-769027.html

Sources

CVE List CVE-2022-2663
NVD CVE-2022-2663

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

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