{"id":"CVE-2026-99056","revision":null,"records":[{"revision":"c6517ee34e5e4cbb9370bbd96e8ab07a","observedAt":"2026-10-24T16:17:04.479+00:00","statement":{"source":"cve-program","id":"CVE-2026-99056","aliases":[],"title":"strparser: make sure __strp_recv isn't running before tearing down the parser","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nstrparser: make sure __strp_recv isn't running before tearing down the parser\n\nThe comment above strp_done() claims that if strp is stopped,\nstrp_recv will no longer be called. That's only true if the caller has\na mechanism (eg locking) to guarantee that strp_recv() calls that\nstarted before strp_stop() have completed by the time we call\nstrp_done().\n\nThis adds a dummy lock_sock/release_sock pair to guarantee that any\nin-flight strp_recv() (which runs under either bh_lock_sock or\nlock_sock, depending if it's called from ->sk_data_ready or strp_work)\nhas completed.\n\nOnly espintcp can be affected by this race condition, but this patch\nmakes sure no future user of strp can have the bug.\n\nThis could crash on strp->sk (\"general mode\" of strp), but this mode\nhas been here for 9 years and has never been used. It'll be gone soon,\nno point worrying about it.\n\nSwitch the stopped/paused/etc bits to u8's to avoid races between\nstrp_stop() and strp_pause/unpause().\n\nA reproducer has been published and turns the possible UAF into an\nexploit [1].","state":0,"publishedAt":"2026-10-23T12:22:42.234+00:00","modifiedAt":"2026-10-24T14:10:15.756+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 \"Documentation/networking/strparser.rst\",\n \"include/net/strparser.h\",\n \"net/strparser/strparser.c\"\n ],\n \"versions\": [\n {\n \"version\": \"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593\",\n \"lessThan\": \"a18dd388045dc7263d99a07db9de4e0f149ca8f1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593\",\n \"lessThan\": \"9f3e9fe1b155e9b4572054d8d140586bc3512ecf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593\",\n \"lessThan\": \"d2b5f637b9b67a79a50d42614d10653c13b4e449\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593\",\n \"lessThan\": \"eaa3a29004c063d7e9d5ea55636f693f67e6db0f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e27cca96cd68fa2c6814c90f9a1cfd36bb68c593\",\n \"lessThan\": \"0984ebc631792acf8fff105112ee74a6b8f1efcc\",\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 \"Documentation/networking/strparser.rst\",\n \"include/net/strparser.h\",\n \"net/strparser/strparser.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.6\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.6\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.160\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.113\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.57\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.11\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\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/a18dd388045dc7263d99a07db9de4e0f149ca8f1","https://git.kernel.org/stable/c/9f3e9fe1b155e9b4572054d8d140586bc3512ecf","https://git.kernel.org/stable/c/d2b5f637b9b67a79a50d42614d10653c13b4e449","https://git.kernel.org/stable/c/eaa3a29004c063d7e9d5ea55636f693f67e6db0f","https://git.kernel.org/stable/c/0984ebc631792acf8fff105112ee74a6b8f1efcc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99056","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99056","identifiers":["CVE-2026-99056"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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