High severity · published Nov 12, 2025
CVE-2025-40135
ipv6: use RCU in ip6_xmit()
8.1
CVSS
0.7%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before f0a54d00d2f36de40266f47c27989853e8588656; 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before f69fec6287565fdeb61f65e700a1184352306943; 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before bd0905e2122e3680968cd0741966983490bf2ed3; 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before f7f9e924f23684b4b23cd9f976cceab24a968e34; 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 before 9085e56501d93af9f2d7bd16f7fcfacdde47b99c; 4.13 · source: vendor
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40135
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40135
git.kernel.org
https://git.kernel.org/stable/c/9085e56501d93af9f2d7bd16f7fcfacdde47b99c
git.kernel.org
https://git.kernel.org/stable/c/bd0905e2122e3680968cd0741966983490bf2ed3
git.kernel.org
https://git.kernel.org/stable/c/f0a54d00d2f36de40266f47c27989853e8588656
git.kernel.org
https://git.kernel.org/stable/c/f69fec6287565fdeb61f65e700a1184352306943
git.kernel.org
https://git.kernel.org/stable/c/f7f9e924f23684b4b23cd9f976cceab24a968e34
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
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