{"id":"CVE-2026-53275","revision":null,"records":[{"revision":"fcedf011319845e5bcd0961bfe9ca1e3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53275","aliases":[],"title":"ipv6: mcast: Fix use-after-free when processing MLD queries","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: Fix use-after-free when processing MLD queries\n\nWhen processing an MLD query, a pointer to the multicast group address\nis retrieved when initially parsing the packet. This pointer is later\ndereferenced without being reloaded despite the fact that the skb header\nmight have been reallocated following the pskb_may_pull() calls, leading\nto a use-after-free [1].\n\nFix by copying the multicast group address when the packet is initially\nparsed.\n\n[1]\nBUG: KASAN: slab-use-after-free in __mld_query_work (net/ipv6/mcast.c:1512)\nRead of size 8 at addr ffff8881154b8e90 by task kworker/4:1/118\n\nWorkqueue: mld mld_query_work\nCall Trace:\n\ndump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)\nprint_address_description.constprop.0 (mm/kasan/report.c:378)\nprint_report (mm/kasan/report.c:482)\nkasan_report (mm/kasan/report.c:595)\n__mld_query_work (net/ipv6/mcast.c:1512)\nmld_query_work (net/ipv6/mcast.c:1563)\nprocess_one_work (kernel/workqueue.c:3314)\nworker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)\nkthread (kernel/kthread.c:436)\nret_from_fork (arch/x86/kernel/process.c:158)\nret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n\n\n[...]\n\nFreed by task 118:\nkasan_save_stack (mm/kasan/common.c:57)\nkasan_save_track (mm/kasan/common.c:78)\nkasan_save_free_info (mm/kasan/generic.c:584)\n__kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285)\nkfree (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6251 mm/slub.c:6566)\npskb_expand_head (net/core/skbuff.c:2335)\n__pskb_pull_tail (net/core/skbuff.c:2878 (discriminator 4))\n__mld_query_work (net/ipv6/mcast.c:1495 (discriminator 1))\nmld_query_work (net/ipv6/mcast.c:1563)\nprocess_one_work (kernel/workqueue.c:3314)\nworker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)\nkthread (kernel/kthread.c:436)\nret_from_fork (arch/x86/kernel/process.c:158)\nret_from_fork_asm (arch/x86/entry/entry_64.S:245)","state":0,"publishedAt":"2026-06-25T08:39:59.115+00:00","modifiedAt":"2026-10-19T19:57:33.329+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/ipv6/mcast.c\"\n ],\n \"versions\": [\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"dfaf1f5e7eb81be87582bd6a57d34e61a57d5dea\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"1354271c89d0e5fbf8b3d94097ff0216695209c7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"53baa63a4183291574483f89583dbef13677a2c4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"2a613bf497029d555a7428406aa8cdb84a503cea\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"b2eb8886200b907fc71806869620609f0f4cacb0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"4203806f700bb44ea0b05d484d9d40044b47fb04\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"087dbacf897c020f438f780f0a4a8aa73b6d7c5a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"97300b5fdfe28c6edae926926f9467a27cf5889c\",\n \"lessThan\": \"791c91dc7a9dfb2457d5e29b8216a6484b9c4b40\",\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/ipv6/mcast.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.15\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.15\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.269\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.210\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.176\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.94\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.36\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.13\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/dfaf1f5e7eb81be87582bd6a57d34e61a57d5dea","https://git.kernel.org/stable/c/1354271c89d0e5fbf8b3d94097ff0216695209c7","https://git.kernel.org/stable/c/53baa63a4183291574483f89583dbef13677a2c4","https://git.kernel.org/stable/c/2a613bf497029d555a7428406aa8cdb84a503cea","https://git.kernel.org/stable/c/b2eb8886200b907fc71806869620609f0f4cacb0","https://git.kernel.org/stable/c/4203806f700bb44ea0b05d484d9d40044b47fb04","https://git.kernel.org/stable/c/087dbacf897c020f438f780f0a4a8aa73b6d7c5a","https://git.kernel.org/stable/c/791c91dc7a9dfb2457d5e29b8216a6484b9c4b40"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53275","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53275","identifiers":["CVE-2026-53275"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-f1b70ba09149408c9b3f93f80725b8b9","complete":true,"records":13654,"lastAttemptAt":"2026-11-08T19:48:04.0257169+00:00","lastSuccessAt":"2026-11-08T19:48:04.022+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:48:04.022+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T19:47:20.1649891+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T19:47:20.1649891+00:00","lastSuccessAt":"2026-11-08T19:47:20.3951142+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:47:20.3951146+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. No reader inventory is sent.","generation":"enrichment-3b79c659b4ac42b2801e63ff6ff3a882","complete":false,"records":13666,"lastAttemptAt":"2026-11-08T19:47:46.1695591+00:00","lastSuccessAt":"2026-11-08T19:47:46.166+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:47:46.166+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13206,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T19:47:20.0165357+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:47:20.0165357+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T19:47:19.7560084+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:47:19.7560084+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-964c14035e6f0f6478b2870fad6a7ef9f6045876d4a12af2c2e514521e54b6af","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T19:47:20.1181272+00:00","lastSuccessAt":"2026-11-08T11:07:12.1927025+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:47:20.1181272+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-f8647d7ba64b1ba0dfdc7130944766d5b36d5b77d18fff0c79e651a4cff3c2b9","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T19:47:19.9161497+00:00","lastSuccessAt":"2026-11-08T11:06:56.2918717+00:00","error":null,"lastVerifiedAt":"2026-11-08T19:47:19.9161497+00:00","snapshotPublishedAt":"2026-11-08T11:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}