{"cve":"CVE-2022-2663","nvd":{"published":"2022-09-01T21:15:09.653","modified":"2026-10-14T14:17:22.007","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-923"],"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"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:35:14.992143698+00:00"},"epss":{"cve":"CVE-2022-2663","score":0.03813,"percentile":0.89969,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}