vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2025-40135

ipv6: use RCU in ip6_xmit()

HIGH
8.1
CVSS Score
Published: November 12, 2025 at 10:23 AM UTC
Updated: October 19, 2026 at 09:10 PM UTC
4 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.1
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
4.134a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36
Vendor states this is fixed in 9085e56501d93af9f2d7bd16f7fcfacdde47b99c (fixed)
Vendor states this is fixed in bd0905e2122e3680968cd0741966983490bf2ed3 (fixed)
Vendor states this is fixed in f0a54d00d2f36de40266f47c27989853e8588656 (fixed)
Vendor states this is fixed in f69fec6287565fdeb61f65e700a1184352306943 (fixed)
Vendor states this is fixed in f7f9e924f23684b4b23cd9f976cceab24a968e34 (fixed)
Vendor states this is fixed in 4.13 (unaffected)
Vendor states this is fixed in 6.1.167 (unaffected)
Vendor states this is fixed in 6.12.78 (unaffected)
Vendor states this is fixed in 6.17.3 (unaffected)
Vendor states this is fixed in 6.18 (unaffected)
Vendor states this is fixed in 6.6.130 (unaffected)
SIMATIC S7-1500 CPU 1518-4 Pn /dp MFP Firmware· Siemens
60%
v ≥ V3.1.5v ≥ V3.1.63.1.53.1.6
SIMATIC S7-1500 CPU 1518F 4 Pn /dp MFP Firmware· Siemens
60%
v ≥ V3.1.5v ≥ V3.1.63.1.53.1.6
Siplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware· Siemens
60%
v ≥ V3.1.5v ≥ V3.1.63.1.53.1.6

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (9)

Source: cverecord
https://git.kernel.org/stable/c/f7f9e924f23684b4b23cd9f976cceab24a968e34
Source: cverecord
https://git.kernel.org/stable/c/9085e56501d93af9f2d7bd16f7fcfacdde47b99c
Source: cverecord
https://git.kernel.org/stable/c/f0a54d00d2f36de40266f47c27989853e8588656
Source: cverecord
https://git.kernel.org/stable/c/f69fec6287565fdeb61f65e700a1184352306943
Source: cverecord
https://git.kernel.org/stable/c/bd0905e2122e3680968cd0741966983490bf2ed3
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHLinux
Vector?

Quick Info

StatusDEFERRED

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card