Back
CVE-2022-2663An issue was found in the Linux kernel in nf_conntrack_irc where the message handling can be confused and incorrectly matches the message.…
- 5.3MediumCVSS base score
- 4.1%Exploitation in 30 daysEPSS · top 9.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 28 days later
· 28 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.2% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
Linux kernel
- affected unknown
References
References9
- https://www.openwall.com/lists/oss-security/2022/08/30/1 (opens in a new tab)x_transferred
- https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/ (opens in a new tab)x_transferred
- [debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update (opens in a new tab)mailing-listx_transferred
- https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663 (opens in a new tab)x_transferred
- https://www.youtube.com/watch?v=WIq-YgQuYCA (opens in a new tab)x_transferred
- DSA-5257 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20221101 [SECURITY] [DLA 3173-1] linux-5.10 security update (opens in a new tab)mailing-listx_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-769027.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-34909 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-2663)Record last updated .