{"id":"CVE-2026-43074","revision":null,"records":[{"revision":"a120a2a369f64128af347ad7179c9ed3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43074","aliases":[],"title":"eventpoll: defer struct eventpoll free to RCU grace period","description":"In the Linux kernel, the following vulnerability has been resolved:\n\neventpoll: defer struct eventpoll free to RCU grace period\n\nIn certain situations, ep_free() in eventpoll.c will kfree the epi->ep\neventpoll struct while it still being used by another concurrent thread.\nDefer the kfree() to an RCU callback to prevent UAF.","state":0,"publishedAt":"2026-05-06T07:21:58.21+00:00","modifiedAt":"2026-10-19T19:06:12.716+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 \"fs/eventpoll.c\"\n ],\n \"versions\": [\n {\n \"version\": \"f2451def095c1743adcfcb0cb5dadc86034e162a\",\n \"lessThan\": \"902120be4f44947df6311002addc7faf69bdbff1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a1f93804449d13f97dabd4b996817de4bf1ed67a\",\n \"lessThan\": \"a6d57084372161f86660bc4607784420e00efe2c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"58c9b016e12855286370dfb704c08498edbc857a\",\n \"lessThan\": \"a6566cd33f6f967a7651ebf2ce0dd31572e319cf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"58c9b016e12855286370dfb704c08498edbc857a\",\n \"lessThan\": \"5b1173b165421561db29f30afc7e97d940a398a9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"58c9b016e12855286370dfb704c08498edbc857a\",\n \"lessThan\": \"7e8083f5eeedab0f460063b9c2c14c9a4e71a427\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"58c9b016e12855286370dfb704c08498edbc857a\",\n \"lessThan\": \"ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"58c9b016e12855286370dfb704c08498edbc857a\",\n \"lessThan\": \"07712db80857d5d09ae08f3df85a708ecfc3b61f\",\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 \"fs/eventpoll.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.4\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.4\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.136\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.83\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.24\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.14\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\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/902120be4f44947df6311002addc7faf69bdbff1","https://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2c","https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf","https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9","https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427","https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322","https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43074","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43074","identifiers":["CVE-2026-43074"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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