{"id":"CVE-2025-21863","revision":null,"records":[{"revision":"85e2a0358dea45679fbc07130a99f2ee","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21863","aliases":[],"title":"io_uring: prevent opcode speculation","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: prevent opcode speculation\n\nsqe->opcode is used for different tables, make sure we santitise it\nagainst speculations.","state":0,"publishedAt":"2025-03-12T09:42:20.552+00:00","modifiedAt":"2026-10-15T01:04:54.584+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 \"io_uring/io_uring.c\"\n ],\n \"versions\": [\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"87e9eef43c758da267f6332678058a79764c7eba\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"18eae8420081ef8e043ad455937bfb470ef08607\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"d261ead565a080e3411b0dd04e6d58a52471cac8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"b9826e3b26ec031e9063f64a7c735449c43955e4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"506b9b5e8c2d2a411ea8fe361333f5081c56d23a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"fdbfd52bd8b85ed6783365ff54c82ab7067bd61b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d3656344fea0339fb0365c8df4d2beba4e0089cd\",\n \"lessThan\": \"1e988c3fe1264708f4f92109203ac5b1d65de50b\",\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 \"io_uring/io_uring.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\": \"5.10.259\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.80\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.17\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.13.5\",\n \"lessThanOrEqual\": \"6.13.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.14\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/87e9eef43c758da267f6332678058a79764c7eba","https://git.kernel.org/stable/c/18eae8420081ef8e043ad455937bfb470ef08607","https://git.kernel.org/stable/c/d261ead565a080e3411b0dd04e6d58a52471cac8","https://git.kernel.org/stable/c/b9826e3b26ec031e9063f64a7c735449c43955e4","https://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23a","https://git.kernel.org/stable/c/fdbfd52bd8b85ed6783365ff54c82ab7067bd61b","https://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21863","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21863","identifiers":["CVE-2025-21863"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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