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CVE-2026-23442

ipv6: add NULL checks for idev in SRv6 paths

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in 0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in 83d705d35e583cb1b1eacf196dfe7b77d442018e; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in d1bd8b9edc6752d10f84d28ff64f842401ce336d; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in 50352fc103928e10e8729abc79a0d05abef26c4d; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in bc9843c39f9932a8b36efd1d362ea00bb88e4e78; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in c5cedee5d97382176573bbe21e1724e737a5eb64; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in a25853c9feea7bbf31d157ff6e004d2d3b4f7f13; From 1ababeba4a21f3dba3da3523c670b207fb2feb62 · fixed in 06413793526251870e20402c39930804f14d59c0

  • Linux Linux

    4.10

  • KernelLinux

    From 4.10.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.136; From 6.7.0 · fixed in 6.12.83; From 6.13.0 · fixed in 6.18.25; From 6.19.0 · fixed in 6.19.10

References 8

git.kernel.org