High 8.8Published Aug 15, 2026

CVE-2026-72051net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink

Updated under an hour ago (Oct 26, 2026, 3:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink ip6_tnl_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 ip6_tnl_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.

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): CWE-862
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 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 0bd8762824e73a3cce7b7560a97463301764b616 before 2d53ee7daabe733deb81f51d2cc90188f8ad59a1; from 0bd8762824e73a3cce7b7560a97463301764b616 before 82e53e7281c71e174f9f5877c566a623c637b406; from 0bd8762824e73a3cce7b7560a97463301764b616 before 5252db8fb604321133138c7069d6fc3fcd89cdee; from 0bd8762824e73a3cce7b7560a97463301764b616 before 2636d061bc237a2446a146e42dcc6563acfa7432; from 0bd8762824e73a3cce7b7560a97463301764b616 before 7f68f7928484f463a5bc0d50e6fdd8d16f55a5aa; from 0bd8762824e73a3cce7b7560a97463301764b616 before 234cd54fc500f69db43e37de38603da617fbbeea; from 0bd8762824e73a3cce7b7560a97463301764b616 before d4bcc202a3530c856e1cb183384bc9cc8fddab22; from 0bd8762824e73a3cce7b7560a97463301764b616 before 2496fa0b7d180b3ad356b514e7ff93bb14e6140a	CNA record

References

References

https://git.kernel.org/stable/c/2d53ee7daabe733deb81f51d2cc90188f8ad59a1
https://git.kernel.org/stable/c/82e53e7281c71e174f9f5877c566a623c637b406
https://git.kernel.org/stable/c/5252db8fb604321133138c7069d6fc3fcd89cdee
https://git.kernel.org/stable/c/2636d061bc237a2446a146e42dcc6563acfa7432
https://git.kernel.org/stable/c/7f68f7928484f463a5bc0d50e6fdd8d16f55a5aa
https://git.kernel.org/stable/c/234cd54fc500f69db43e37de38603da617fbbeea
https://git.kernel.org/stable/c/d4bcc202a3530c856e1cb183384bc9cc8fddab22
https://git.kernel.org/stable/c/2496fa0b7d180b3ad356b514e7ff93bb14e6140a

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.