{"id":"CVE-2026-74563","revision":null,"records":[{"revision":"67a07d48904c4a8388093a29a14f232a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74563","aliases":[],"title":"rds: tcp: hold the RCU lock across ipv6_chk_addr() in rds_tcp_laddr_check()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: hold the RCU lock across ipv6_chk_addr() in rds_tcp_laddr_check()\n\nrds_tcp_laddr_check() looks up a scoped IPv6 interface with\ndev_get_by_index_rcu(), drops the RCU read-side lock, and only then\npasses the bare struct net_device * into ipv6_chk_addr().\n\ndev_get_by_index_rcu() only keeps the device alive within the same RCU\nread-side section. After rcu_read_unlock(), a concurrent RTM_DELLINK can\nfree the net_device; ipv6_chk_addr() then dereferences the stale pointer\nin __ipv6_chk_addr_and_flags() (e.g. l3mdev_master_dev_rcu(dev)), reading\nfreed memory.\n\nKeep the RCU read-side lock held across the ipv6_chk_addr() call instead\nof dropping it right after the lookup, so the device cannot be freed\nwhile it is in use.\n\n BUG: KASAN: slab-use-after-free in __ipv6_chk_addr_and_flags (... net/ipv6/addrconf.c:1998)\n Read of size 8 at addr ffff8880106ec000 by task exploit/153\n Call Trace:\n ...\n kasan_report (mm/kasan/report.c:595)\n __ipv6_chk_addr_and_flags (... net/ipv6/addrconf.c:1998)\n ipv6_chk_addr (net/ipv6/addrconf.c:2031 net/ipv6/addrconf.c:1972)\n rds_tcp_laddr_check (net/rds/tcp.c:370)\n rds_bind (net/rds/bind.c:248)\n __sys_bind (net/socket.c:1920)\n __x64_sys_bind (net/socket.c:1956)\n do_syscall_64 (arch/x86/entry/syscall_64.c:63)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)","state":0,"publishedAt":"2026-08-15T12:28:05.768+00:00","modifiedAt":"2026-10-16T19:05:55.886+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/rds/tcp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"f8a8977af2134a1d91e5f9773cb7d9d53278c830\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"ba95bce5dfe6e2ef602a87e0557225f2934ccb5c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"c4933624a6f416ecfcc31ab58d585da1207a0597\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"76dd48886eeeb5fcf2b837d2f4c3d17eebeac9ef\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"f0d1fb05d70c8a561cd8d0473bcacafa2fc137ff\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"b1d480fce05f857dc438080cd8c9244b84a83494\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"8398bc477d3cb3e2b018a5aaac2bec0f69acda30\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"eee2fa6ab3225192d6d894c54a6fb02ac9efdff6\",\n \"lessThan\": \"78f75d632f74b8de0f081a128588f7c37d0d1164\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/rds/tcp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.19\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.19\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.265\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.216\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.183\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.151\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.103\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.44\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.8\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f8a8977af2134a1d91e5f9773cb7d9d53278c830","https://git.kernel.org/stable/c/ba95bce5dfe6e2ef602a87e0557225f2934ccb5c","https://git.kernel.org/stable/c/c4933624a6f416ecfcc31ab58d585da1207a0597","https://git.kernel.org/stable/c/76dd48886eeeb5fcf2b837d2f4c3d17eebeac9ef","https://git.kernel.org/stable/c/f0d1fb05d70c8a561cd8d0473bcacafa2fc137ff","https://git.kernel.org/stable/c/b1d480fce05f857dc438080cd8c9244b84a83494","https://git.kernel.org/stable/c/8398bc477d3cb3e2b018a5aaac2bec0f69acda30","https://git.kernel.org/stable/c/78f75d632f74b8de0f081a128588f7c37d0d1164"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74563","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74563","identifiers":["CVE-2026-74563"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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Not a global EPSS backfill.","generation":"2026-11-09T08:02:26.2193293+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T08:02:26.2193293+00:00","lastSuccessAt":"2026-11-09T08:02:26.3910394+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:26.3910397+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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