CVE-2026-31692

5.5 Moyenne

Publiée le 30/04/2026 à 13:16 · Modifiée le 17/06/2026 à 12:34 · Analysée par le NVD · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: rtnetlink: add missing netlink_ns_capable() check for peer netns rtnl_newlink() lacks a CAP_NET_ADMIN capability check on the peer network namespace when creating paired devices (veth, vxcan, netkit). This allows an unprivileged user with a user namespace to create interfaces in arbitrary network namespaces, including init_net. Add a netlink_ns_capable() check for CAP_NET_ADMIN in the peer namespace before allowing device creation to proceed.

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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	5.5 Moyenne	nvd@nist.gov (NVD)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`

Références

https://git.kernel.org/stable/c/0975b64ffb34560042090a5986c3a02e6c80f36f Patch
https://git.kernel.org/stable/c/7b735ef81286007794a227ce2539419479c02a5f Patch
https://git.kernel.org/stable/c/d04cc16d3624218a5458b2b664ae431f1b3b334d Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories