CVE-2026-31674

HIGH

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 v3.1 Score

7.1
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Published: 4/25/2026Modified: 7/14/2026

Related Intelligence (1)

CRITICALAi

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

<p><a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-209-04.json"><strong>View CSAF</strong></a></p> <h2>Summary</h2> <p><strong>Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.6 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). Siemens is preparing fix versions and recommend

CVE-2021-41617CVE-2023-28531
CISA Advisories

References (10)

https://git.kernel.org/stable/c/13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfaPatchhttps://git.kernel.org/stable/c/29ea965a1353bc8303877422f79c8211e9ba9c55Patchhttps://git.kernel.org/stable/c/9d3f027327c2fa265f7f85ead41294792c3296edPatchhttps://git.kernel.org/stable/c/a28ebf6f99de270d6338ccdc3b49f3e818f99b7bPatchhttps://git.kernel.org/stable/c/af9b7e2b765966457f4ec23be5bd34a141f89574Patchhttps://git.kernel.org/stable/c/c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59Patchhttps://git.kernel.org/stable/c/d8795fde1f78669a87c87ac29fceab2f104daa8cPatchhttps://git.kernel.org/stable/c/ded71f5684df16fa645cca5bf4fe6b0cd8a46119Patchhttps://cert-portal.siemens.com/productcert/html/ssa-019113.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html