CVE-2026-72051
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/234cd54fc500f69db43e37de38603da617fbbeea
- https://git.kernel.org/stable/c/2496fa0b7d180b3ad356b514e7ff93bb14e6140a
- https://git.kernel.org/stable/c/2636d061bc237a2446a146e42dcc6563acfa7432
- https://git.kernel.org/stable/c/2d53ee7daabe733deb81f51d2cc90188f8ad59a1
- https://git.kernel.org/stable/c/5252db8fb604321133138c7069d6fc3fcd89cdee
- https://git.kernel.org/stable/c/7f68f7928484f463a5bc0d50e6fdd8d16f55a5aa
- https://git.kernel.org/stable/c/82e53e7281c71e174f9f5877c566a623c637b406
- https://git.kernel.org/stable/c/d4bcc202a3530c856e1cb183384bc9cc8fddab22
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.