{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31692","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.131Z","datePublished":"2026-04-30T10:34:51.589Z","dateUpdated":"2026-11-06T15:32:23.289Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:13:52.952Z"},"descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/rtnetlink.c"],"versions":[{"version":"81adee47dfb608df3ad0b91d230fb3cef75f0060","lessThan":"0975b64ffb34560042090a5986c3a02e6c80f36f","status":"affected","versionType":"git"},{"version":"81adee47dfb608df3ad0b91d230fb3cef75f0060","lessThan":"d04cc16d3624218a5458b2b664ae431f1b3b334d","status":"affected","versionType":"git"},{"version":"81adee47dfb608df3ad0b91d230fb3cef75f0060","lessThan":"7b735ef81286007794a227ce2539419479c02a5f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/rtnetlink.c"],"versions":[{"version":"2.6.33","status":"affected"},{"version":"0","lessThan":"2.6.33","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.33","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.33","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.33","versionEndExcluding":"7.0"}]}]}],"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"}],"title":"rtnetlink: add missing netlink_ns_capable() check for peer netns","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-31692","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-11-06T15:24:27.396675Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-06T15:32:23.289Z"}}]}}