{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46120","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-13T15:03:33.098Z","datePublished":"2026-05-28T09:35:35.385Z","dateUpdated":"2026-06-14T17:55:54.746Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-14T17:55:54.746Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6_gre: Use cached t->net in ip6erspan_changelink().\n\nAfter commit 5e72ce3e3980 (\"net: ipv6: Use link netns in newlink() of\nrtnl_link_ops\"), ip6erspan_newlink() correctly resolves the per-netns\nip6gre hash via link_net. ip6erspan_changelink() was not converted in\nthat series and still uses dev_net(dev), which diverges from the\ndevice's creation netns after IFLA_NET_NS_FD migration.\n\nThis re-inserts the tunnel into the wrong per-netns hash. The\noriginal netns keeps a stale entry. When that netns is later\ndestroyed, ip6gre_exit_rtnl_net() walks the stale entry, producing a\nslab-use-after-free reported by KASAN, followed by a kernel BUG at\nnet/core/dev.c (LIST_POISON1) in unregister_netdevice_many_notify().\n\nReachable from an unprivileged user namespace (unshare --user\n--map-root-user --net).\n\nip6gre_changelink() earlier in the same file already uses the cached\nt->net; only ip6erspan_changelink() has the wrong shape."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_gre.c"],"versions":[{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"7bd0f2b162b426b343a114e1b329f0d8d14fdc6e","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"01b71ff2857d3598337de11e7840a8e3ff21553c","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"0fcf6731706f73494245a9c0d64f93bebf95bb51","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"eca62bb0569de4d43a4dac06a2092a9d4ca1d702","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"311fdd26eb4443d43b909cc67a10f3a5fd1b21b2","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"cf7fc624329e76c6394653d12353e1d033adea91","status":"affected","versionType":"git"},{"version":"2d665034f239412927b1e71329f20f001c92da09","lessThan":"1d324c2f43f70c965f25c58cc3611c779adbe47e","status":"affected","versionType":"git"},{"version":"c6d72628352c949629af619b77b042e0fb5245e7","status":"affected","versionType":"git"},{"version":"4.16.12","lessThan":"4.17","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_gre.c"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.140","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.88","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.30","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.7","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","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":"4.17","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16.12"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7bd0f2b162b426b343a114e1b329f0d8d14fdc6e"},{"url":"https://git.kernel.org/stable/c/01b71ff2857d3598337de11e7840a8e3ff21553c"},{"url":"https://git.kernel.org/stable/c/0fcf6731706f73494245a9c0d64f93bebf95bb51"},{"url":"https://git.kernel.org/stable/c/eca62bb0569de4d43a4dac06a2092a9d4ca1d702"},{"url":"https://git.kernel.org/stable/c/311fdd26eb4443d43b909cc67a10f3a5fd1b21b2"},{"url":"https://git.kernel.org/stable/c/e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82"},{"url":"https://git.kernel.org/stable/c/cf7fc624329e76c6394653d12353e1d033adea91"},{"url":"https://git.kernel.org/stable/c/1d324c2f43f70c965f25c58cc3611c779adbe47e"}],"title":"ip6_gre: Use cached t->net in ip6erspan_changelink().","x_generator":{"engine":"bippy-1.2.0"}}}}