CVE-2026-72061net: sit: require CAP_NET_ADMIN in the device netns for changelink
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before cb41b308e9d867725d965b291dd085028e36a480; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before c5a0ae895432596b2f464172da8218e2d84e2932; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before 7d139dec96691cde96cb40ed293e2d13d994fb4f; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before 388ccffbd2e7e5e4271f291085a7451865705305; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before c0ea1aedb37bb979e864ed7787975434bbd9db73; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before 3118e97dae533fb45964b87bbed1801afcff7c65; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before 99ae3248b33df94201915d9c32e7470cdf08cfcd; from 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 before 27ccb68e7cccead5d8c611665a45d23032d468b3 | CNA record |
References
- https://git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480
- https://git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932
- https://git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f
- https://git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305
- https://git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73
- https://git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65
- https://git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd
- https://git.kernel.org/stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3
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.