HarborGuard / CVE
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HIGHCVE-2026-31674Published Modified CNA Linux

CVE-2026-31674: netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()

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.

Metrics

CVSS v3.1
7.1
Severity
HIGH
Fixed in
0
Affected Products
2

Fix available

013e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa29ea965a1353bc8303877422f79c8211e9ba9c555.10.2535.15.2036.1.1686.6.1316.12.806.18.216.19.117.09d3f027327c2fa265f7f85ead41294792c3296eda28ebf6f99de270d6338ccdc3b49f3e818f99b7baf9b7e2b765966457f4ec23be5bd34a141f89574c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59d8795fde1f78669a87c87ac29fceab2f104daa8cded71f5684df16fa645cca5bf4fe6b0cd8a46119
Affected packages
  • Linux / Linux
    < 13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa (from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2) · < af9b7e2b765966457f4ec23be5bd34a141f89574 (from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2) · < 29ea965a1353bc8303877422f79c8211e9ba9c55 (from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2) · < c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59 (from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2) · < ded71f5684df16fa645cca5bf4fe6b0cd8a46119 (from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2) · < d8795fde1f78669a87c87ac29fceab2f104daa8c (from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2)
  • Linux / Linux
    2.6.12
    Fixed in 0, 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11, 7.0
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
References