{"id":"CVE-2026-23364","revision":null,"records":[{"revision":"12b40360b5494e40a340db1d2e066871","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23364","aliases":[],"title":"ksmbd: Compare MACs in constant time","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Compare MACs in constant time\n\nTo prevent timing attacks, MAC comparisons need to be constant-time.\nReplace the memcmp() with the correct function, crypto_memneq().","state":0,"publishedAt":"2026-03-25T10:27:46.96+00:00","modifiedAt":"2026-10-15T01:14:22.928+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/smb/server/Kconfig\",\n \"fs/smb/server/auth.c\",\n \"fs/smb/server/smb2pdu.c\"\n ],\n \"versions\": [\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"8a665d733940592e671ec6afadcd0be80a091a80\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"cd52a0e309659537048a864211abc3ea4c5caa63\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"307afccb751f542246bd5dc68a2c1ffe1a78418c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"2cdc56ed67615ba0921383a688f24415ebe065f3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"93c0a22fec914ec4b697e464895a0f594e29fb28\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"f4588b85efd6007d46b80aa1b9fb746628ffb3dc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\",\n \"lessThan\": \"c5794709bc9105935dbedef8b9cf9c06f2b559fa\",\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/smb/server/Kconfig\",\n \"fs/smb/server/auth.c\",\n \"fs/smb/server/smb2pdu.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.15\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.15\",\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\": \"6.1.167\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.130\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.78\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.19\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.7\",\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:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8a665d733940592e671ec6afadcd0be80a091a80","https://git.kernel.org/stable/c/cd52a0e309659537048a864211abc3ea4c5caa63","https://git.kernel.org/stable/c/307afccb751f542246bd5dc68a2c1ffe1a78418c","https://git.kernel.org/stable/c/2cdc56ed67615ba0921383a688f24415ebe065f3","https://git.kernel.org/stable/c/93c0a22fec914ec4b697e464895a0f594e29fb28","https://git.kernel.org/stable/c/f4588b85efd6007d46b80aa1b9fb746628ffb3dc","https://git.kernel.org/stable/c/c5794709bc9105935dbedef8b9cf9c06f2b559fa"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23364","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23364","identifiers":["CVE-2026-23364"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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