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.
Updated under an hour ago ()
Does this affect you?
It affects Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-923
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | all versions | NVD |
debian debian_linux debian:debian_linux | 10.0; 11.0 | NVD |
References
- https://www.openwall.com/lists/oss-security/2022/08/30/1mailing-list, third-party-advisory
- https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlmailing-list, third-party-advisory
- https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663exploit, third-party-advisory
- https://www.youtube.com/watch?v=WIq-YgQuYCAexploit, third-party-advisory
- https://www.debian.org/security/2022/dsa-5257vendor-advisory, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlmailing-list, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-769027.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.