CVE-2022-2663

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.

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

3.8% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-25)

CWE

CWE-923

Published

2022-09-01

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663
• https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
• https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
• https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/
• https://www.debian.org/security/2022/dsa-5257

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