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Vulnerability record · CVE-2026-31674 · published 25 April 2026

CVE-2026-31674: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() Reject rt match rules whose addrnr exceeds IP6T_RT_HOPS. rt_mt6() expects addrnr to stay within the bounds of rtinfo->addrs[]. Validate addrnr during rule installation so malformed rules are rejected before the match logic can use an out-of-range value.

7.1 CVSS 3.1 High EPSS 0.17% · top 93.9%
7.1CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
14 Jul 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() Reject rt match rules whose addrnr exceeds IP6T_RT_HOPS. rt_mt6() expects addrnr to stay within the bounds of rtinfo->addrs[]. Validate addrnr during rule installation so malformed rules are rejected before the match logic can use an out-of-range value.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa Patch
https://git.kernel.org/stable/c/29ea965a1353bc8303877422f79c8211e9ba9c55 Patch
https://git.kernel.org/stable/c/9d3f027327c2fa265f7f85ead41294792c3296ed Patch
https://git.kernel.org/stable/c/a28ebf6f99de270d6338ccdc3b49f3e818f99b7b Patch
https://git.kernel.org/stable/c/af9b7e2b765966457f4ec23be5bd34a141f89574 Patch
https://git.kernel.org/stable/c/c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59 Patch
https://git.kernel.org/stable/c/d8795fde1f78669a87c87ac29fceab2f104daa8c Patch
https://git.kernel.org/stable/c/ded71f5684df16fa645cca5bf4fe6b0cd8a46119 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

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Source: NIST National Vulnerability Database (record CVE-2026-31674), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.