CVE-2026-72052
In the Linux kernel, the following vulnerability has been resolved: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate on at most two netns, dev_net(dev) and the tunnel link…
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_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate 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 both ops on rtnl_dev_link_net_capable() at their 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/03d8843b143ebbbfaf48511922abc6e886575a61
- https://git.kernel.org/stable/c/0caa9f348f8b5356900de77b0bb89a697c4aff20
- https://git.kernel.org/stable/c/129f8939e5af683cec3a1a5edcb40a64636ad81e
- https://git.kernel.org/stable/c/1d4d8ee002083ca4ead5353662bf8362428af57f
- https://git.kernel.org/stable/c/220162c9fedbe992da70d70f50a10da4f45f914c
- https://git.kernel.org/stable/c/c38c8b0db3c65b597e7ece317b6cb59de3d15e69
- https://git.kernel.org/stable/c/e3724dedf57761c6de52f4d604ec74f66fd61611
- https://git.kernel.org/stable/c/f00a50876d2818bd6dc86fa98b3ef360884c53c8
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.