{"id":"CVE-2026-99070","state":"PUBLISHED","title":"ipv6: do not warn on route notification size race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: do not warn on route notification size race\n\nfib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later\nfills it with rt6_fill_node().  With nexthop compatibility mode enabled,\na concurrent replacement can grow the group between these independent\nsnapshots.  rt6_fill_node() can then legitimately return -EMSGSIZE, so\nthe warning does not prove a sizing bug.\n\nRemove the warning.  The existing error path still frees the skb and\nreports the error to listeners.","publishedAt":"2026-10-23T12:23:13.342Z","updatedAt":"2026-10-30T12:41:29.857Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"dac2b0328495971c7b417fd0143e53643343936e","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"24b2c95a046e15c9504a6d672b6b0b252952493f","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"8a3b935b6b6037eefb36bd27a60793a008358e8d","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"7b112bd43f1172fb152e848570a957467008a5ae","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"4ac7d92a4698e34e614c254359665b9de1f65283","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"291fe0bafee78c95f9f2e7f579f17793fd5a1e5a","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"c97426ec649d99596d8969e1a052c16b14b7b485","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/route.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/route.c"]}],"references":["https://git.kernel.org/stable/c/dac2b0328495971c7b417fd0143e53643343936e","https://git.kernel.org/stable/c/24b2c95a046e15c9504a6d672b6b0b252952493f","https://git.kernel.org/stable/c/8a3b935b6b6037eefb36bd27a60793a008358e8d","https://git.kernel.org/stable/c/7b112bd43f1172fb152e848570a957467008a5ae","https://git.kernel.org/stable/c/4ac7d92a4698e34e614c254359665b9de1f65283","https://git.kernel.org/stable/c/291fe0bafee78c95f9f2e7f579f17793fd5a1e5a","https://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485"],"weaknesses":[],"ingestedAt":"2026-10-30T13:02:04.640Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99070.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99070","state":"PUBLISHED","datePublished":"2026-10-23T12:23:13.342Z","dateUpdated":"2026-10-30T12:41:29.857Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.389Z"},"containers":{"cna":{"title":"ipv6: do not warn on route notification size race","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: do not warn on route notification size race\n\nfib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later\nfills it with rt6_fill_node().  With nexthop compatibility mode enabled,\na concurrent replacement can grow the group between these independent\nsnapshots.  rt6_fill_node() can then legitimately return -EMSGSIZE, so\nthe warning does not prove a sizing bug.\n\nRemove the warning.  The existing error path still frees the skb and\nreports the error to listeners."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"dac2b0328495971c7b417fd0143e53643343936e","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"24b2c95a046e15c9504a6d672b6b0b252952493f","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"8a3b935b6b6037eefb36bd27a60793a008358e8d","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"7b112bd43f1172fb152e848570a957467008a5ae","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"4ac7d92a4698e34e614c254359665b9de1f65283","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"291fe0bafee78c95f9f2e7f579f17793fd5a1e5a","versionType":"git"},{"version":"907eea486888cfe118c19759bbc4b8fca2e004df","status":"affected","lessThan":"c97426ec649d99596d8969e1a052c16b14b7b485","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/route.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/route.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/dac2b0328495971c7b417fd0143e53643343936e"},{"url":"https://git.kernel.org/stable/c/24b2c95a046e15c9504a6d672b6b0b252952493f"},{"url":"https://git.kernel.org/stable/c/8a3b935b6b6037eefb36bd27a60793a008358e8d"},{"url":"https://git.kernel.org/stable/c/7b112bd43f1172fb152e848570a957467008a5ae"},{"url":"https://git.kernel.org/stable/c/4ac7d92a4698e34e614c254359665b9de1f65283"},{"url":"https://git.kernel.org/stable/c/291fe0bafee78c95f9f2e7f579f17793fd5a1e5a"},{"url":"https://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:41:29.857Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}