{"id":"CVE-2026-74581","summary":"net: ipv6: clear suppressed fib6 rule result","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: clear suppressed fib6 rule result\n\nfib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),\nbut leaves res-\u003ert6 pointing at the released rt6_info.\n\nIf no later rule supplies a replacement, fib6_rule_lookup() still sees\nres.rt6 and returns that stale dst to its caller. A suppressing rule can\ntherefore leak a released route back to rt6_lookup(), and the next put\nhits rcuref_put_slowpath() from dst_release().\n\nClear res-\u003ert6 when suppressing the route so suppressed lookups fall\nthrough to the null dst instead of reusing the released one.","modified":"2026-10-28T02:31:07.058512444Z","published":"2026-08-21T16:31:54.683Z","related":["ALSA-2026:59723","ALSA-2026:63013","ALSA-2026:63014","ALSA-2026:63128","SUSE-SU-2026:23477-1","SUSE-SU-2026:23481-1","SUSE-SU-2026:23528-1","SUSE-SU-2026:23529-1","SUSE-SU-2026:23881-1","SUSE-SU-2026:23887-1","SUSE-SU-2026:23897-1","SUSE-SU-2026:23902-1","SUSE-SU-2026:4120-1","SUSE-SU-2026:4254-1","SUSE-SU-2026:4347-1","SUSE-SU-2026:4369-1","SUSE-SU-2026:4595-1","openSUSE-SU-2026:21910-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74581.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/354db6243eca59e9d187ffbf8b7955b044ce84dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d29b286c9de0b309e94b9ed083aa1a2f429434f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6aea62e433fe1b586202a5fee8b5807ce635e1d7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6d98c70fe0ba8c7708bfd5b2a5174d2086775daa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/90c57310e266eb94e4a80d6b15a9ca131d2e82cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9bad152c42b37499162367fe47867411e62fffa3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a341c091ca0bfae377747b1b59a3bd8ebe18a937"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc3ab04220667f254f4348572b2a0b3febff89fb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74581.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74581"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"209d35ee34e25f9668c404350a1c86d914c54ffa"},{"fixed":"90c57310e266eb94e4a80d6b15a9ca131d2e82cb"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8ef8a76a340ebdb2c2eea3f6fb0ebbed09a16383"},{"fixed":"5d29b286c9de0b309e94b9ed083aa1a2f429434f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cdef485217d30382f3bf6448c54b4401648fe3f1"},{"fixed":"354db6243eca59e9d187ffbf8b7955b044ce84dc"},{"fixed":"6d98c70fe0ba8c7708bfd5b2a5174d2086775daa"},{"fixed":"9bad152c42b37499162367fe47867411e62fffa3"},{"fixed":"dc3ab04220667f254f4348572b2a0b3febff89fb"},{"fixed":"a341c091ca0bfae377747b1b59a3bd8ebe18a937"},{"fixed":"6aea62e433fe1b586202a5fee8b5807ce635e1d7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.84"},{"fixed":"5.10.265"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.7"},{"fixed":"5.15.216"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.164"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ee38eb8cf9a7323884c2b8e0adbbeb2192d31e29"}]}],"versions":["v5.10.264","v5.10.263","v5.10.262","v5.10.261","v5.10.260","v5.10.259","v5.10.258","v5.10.257","v5.10.256","v5.10.255","v5.10.254","v5.10.253","v5.10.252","v5.10.251","v5.10.250","v5.10.249","v5.10.248","v5.10.247","v5.10.246","v5.10.245","v5.10.244","v5.10.243","v5.10.242","v5.10.241","v5.10.240","v5.10.239","v5.10.238","v5.10.237","v5.10.236","v5.10.235","v5.10.234","v5.10.233","v5.10.232","v5.10.231","v5.10.230","v5.10.229","v5.10.228","v5.10.227","v5.10.226","v5.10.225","v5.10.224","v5.10.223","v5.10.222","v5.10.221","v5.10.220","v5.10.219","v5.10.218","v5.10.217","v5.10.216","v5.10.215","v5.10.214","v5.10.213","v5.10.212","v5.10.211","v5.10.210","v5.10.209","v5.10.208","v5.10.207","v5.10.206","v5.10.205","v5.10.204","v5.10.203","v5.10.202","v5.10.201","v5.10.200","v5.10.199","v5.10.198","v5.10.197","v5.10.196","v5.10.195","v5.10.194","v5.10.193","v5.10.192","v5.10.191","v5.10.190","v5.10.189","v5.10.188","v5.10.187","v5.10.186","v5.10.185","v5.10.184","v5.10.183","v5.10.182","v5.10.181","v5.10.180","v5.10.179","v5.10.178","v5.10.177","v5.10.176","v5.10.175","v5.10.174","v5.10.173","v5.10.172","v5.10.171","v5.10.170","v5.10.169","v5.10.168","v5.10.167","v5.10.166","v5.10.165","v5.10.164","v5.10.163","v5.10.162","v5.10.161","v5.10.160","v5.10.159","v5.10.158","v5.10.157","v5.10.156","v5.10.155","v5.10.154","v5.10.153","v5.10.152","v5.10.151","v5.10.150","v5.10.149","v5.10.148","v5.10.147","v5.10.146","v5.10.145","v5.10.144","v5.10.143","v5.10.142","v5.10.141","v5.10.140","v5.10.139","v5.10.138","v5.10.137","v5.10.136","v5.10.135","v5.10.134","v5.10.133","v5.10.132","v5.10.131","v5.10.130","v5.10.129","v5.10.128","v5.10.127","v5.10.126","v5.10.125","v5.10.124","v5.10.123","v5.10.122","v5.10.121","v5.10.120","v5.10.119","v5.10.118"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