CVE-2022-2663 Security feature bypass in Linux kernel

What is CVE-2022-2663?

CVE-2022-2663 is a medium-severity vulnerability in Debian Debian Linux, published on 1 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-923

Which versions are affected by CVE-2022-2663?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2022-2663?

Apply the vendor's patch.

Is CVE-2022-2663 being exploited?

There is no known exploitation of CVE-2022-2663 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-2663, GHSA-jq2w-p8gp-86fv, UBUNTU-CVE-2022-2663.