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CVE-2026-72061

net: sit: require CAP_NET_ADMIN in the device netns for changelink

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: net: sit: require CAP_NET_ADMIN in the device netns for changelink ipip6_changelink() operates on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate ipip6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed. sit was the one tunnel type not covered by the recent series that added this check to the other changelink() handlers.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in cb41b308e9d867725d965b291dd085028e36a480; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in c5a0ae895432596b2f464172da8218e2d84e2932; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in 7d139dec96691cde96cb40ed293e2d13d994fb4f; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in 388ccffbd2e7e5e4271f291085a7451865705305; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in c0ea1aedb37bb979e864ed7787975434bbd9db73; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in 3118e97dae533fb45964b87bbed1801afcff7c65; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in 99ae3248b33df94201915d9c32e7470cdf08cfcd; From 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 · fixed in 27ccb68e7cccead5d8c611665a45d23032d468b3

  • Linux Linux

    3.11

  • KernelLinux

    From 3.11.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 8

git.kernel.org