CVE-2026-31674

HIGH

netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()

Title source: cna

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.

References (10)

Core 10

Core References

Vendor Advisory

https://cert-portal.siemens.com/productcert/html/ssa-019113.html

Vendor Advisory

https://cert-portal.siemens.com/productcert/html/ssa-082556.html

https://git.kernel.org/stable/c/13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa

https://git.kernel.org/stable/c/af9b7e2b765966457f4ec23be5bd34a141f89574

https://git.kernel.org/stable/c/29ea965a1353bc8303877422f79c8211e9ba9c55

https://git.kernel.org/stable/c/c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59

https://git.kernel.org/stable/c/ded71f5684df16fa645cca5bf4fe6b0cd8a46119

https://git.kernel.org/stable/c/d8795fde1f78669a87c87ac29fceab2f104daa8c

https://git.kernel.org/stable/c/a28ebf6f99de270d6338ccdc3b49f3e818f99b7b

https://git.kernel.org/stable/c/9d3f027327c2fa265f7f85ead41294792c3296ed

Scores

CVSS v3 7.1

EPSS 0.0012

EPSS Percentile 2.4%

Attack Vector LOCAL

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

Details

Status published

Products (28)

linux/Kernel 2.6.12 - 5.10.253linux

linux/Kernel 5.11.0 - 5.15.203linux

linux/Kernel 5.16.0 - 6.1.168linux

linux/Kernel 6.13.0 - 6.18.21linux

linux/Kernel 6.19.0 - 6.19.11linux

linux/Kernel 6.2.0 - 6.6.131linux

linux/Kernel 6.7.0 - 6.12.80linux

Linux/Linux < 2.6.12

Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa

Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 29ea965a1353bc8303877422f79c8211e9ba9c55

... and 18 more

Published Apr 25, 2026

Tracked Since Apr 25, 2026