{"id":"CVE-2026-31692","title":"rtnetlink: add missing netlink_ns_capable() check for peer netns","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtnetlink: add missing netlink_ns_capable() check for peer netns\n\nrtnl_newlink() lacks a CAP_NET_ADMIN capability check on the peer\nnetwork namespace when creating pair…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 81adee47dfb608df3ad0b91d230fb3cef75f0060 < 0975b64ffb34560042090a5986c3a02e6c80f36f","Linux >= 81adee47dfb608df3ad0b91d230fb3cef75f0060 < d04cc16d3624218a5458b2b664ae431f1b3b334d","Linux >= 81adee47dfb608df3ad0b91d230fb3cef75f0060 < 7b735ef81286007794a227ce2539419479c02a5f","Linux 2.6.33"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:24:27.396675Z"},"published":"2026-04-30","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:23.289Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31692","references":[{"url":"https://git.kernel.org/stable/c/0975b64ffb34560042090a5986c3a02e6c80f36f"},{"url":"https://git.kernel.org/stable/c/d04cc16d3624218a5458b2b664ae431f1b3b334d"},{"url":"https://git.kernel.org/stable/c/7b735ef81286007794a227ce2539419479c02a5f"}],"tags":["cve.org"],"epss":0.00119,"epssPercentile":0.01773,"ingestedAt":"2026-11-06T15:54:04.045Z","slug":"CVE-2026-31692","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nrtnetlink: add missing netlink_ns_capable() check for peer netns\n\nrtnl_newlink() lacks a CAP_NET_ADMIN capability check on the peer\nnetwork namespace when creating paired devices (veth, vxcan,\nnetkit). This allows an unprivileged user with a user namespace\nto create interfaces in arbitrary network namespaces, including\ninit_net.\n\nAdd a netlink_ns_capable() check for CAP_NET_ADMIN in the peer\nnamespace before allowing device creation to proceed.\n\n## Affected\n\n- `Linux >= 81adee47dfb608df3ad0b91d230fb3cef75f0060 < 0975b64ffb34560042090a5986c3a02e6c80f36f`\n- `Linux >= 81adee47dfb608df3ad0b91d230fb3cef75f0060 < d04cc16d3624218a5458b2b664ae431f1b3b334d`\n- `Linux >= 81adee47dfb608df3ad0b91d230fb3cef75f0060 < 7b735ef81286007794a227ce2539419479c02a5f`\n- `Linux 2.6.33`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}