High 8.1Published Nov 12, 2025

CVE-2025-40135ipv6: use RCU in ip6_xmit()

Updated under an hour ago (Oct 27, 2026, 4:50 AM ET)

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It affects Linux and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6_xmit() Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent possible UAF.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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: Deferred
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before f0a54d00d2f36de40266f47c27989853e8588656; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before f69fec6287565fdeb61f65e700a1184352306943; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before bd0905e2122e3680968cd0741966983490bf2ed3; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before f7f9e924f23684b4b23cd9f976cceab24a968e34; from 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 9085e56501d93af9f2d7bd16f7fcfacdde47b99c	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 SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	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

References

References

https://git.kernel.org/stable/c/f0a54d00d2f36de40266f47c27989853e8588656
https://git.kernel.org/stable/c/f69fec6287565fdeb61f65e700a1184352306943
https://git.kernel.org/stable/c/bd0905e2122e3680968cd0741966983490bf2ed3
https://git.kernel.org/stable/c/f7f9e924f23684b4b23cd9f976cceab24a968e34
https://git.kernel.org/stable/c/9085e56501d93af9f2d7bd16f7fcfacdde47b99c
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
https://cert-portal.siemens.com/productcert/html/ssa-784472.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.