CVE-2026-31674netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfa; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before af9b7e2b765966457f4ec23be5bd34a141f89574; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 29ea965a1353bc8303877422f79c8211e9ba9c55; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ded71f5684df16fa645cca5bf4fe6b0cd8a46119; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d8795fde1f78669a87c87ac29fceab2f104daa8c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a28ebf6f99de270d6338ccdc3b49f3e818f99b7b; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9d3f027327c2fa265f7f85ead41294792c3296ed | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.12.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 2.6.12; and 9 more ranges | NVD |
References
- https://git.kernel.org/stable/c/13e3e30ed3b5b67cc1db2bd58a5d09b0f07debfapatch
- https://git.kernel.org/stable/c/af9b7e2b765966457f4ec23be5bd34a141f89574patch
- https://git.kernel.org/stable/c/29ea965a1353bc8303877422f79c8211e9ba9c55patch
- https://git.kernel.org/stable/c/c6a503a9f4debc654e3a6a7ca1f7fce6a9953c59patch
- https://git.kernel.org/stable/c/ded71f5684df16fa645cca5bf4fe6b0cd8a46119patch
- https://git.kernel.org/stable/c/d8795fde1f78669a87c87ac29fceab2f104daa8cpatch
- https://git.kernel.org/stable/c/a28ebf6f99de270d6338ccdc3b49f3e818f99b7bpatch
- https://git.kernel.org/stable/c/9d3f027327c2fa265f7f85ead41294792c3296edpatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.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.