{"id":"CVE-2026-46024","revision":null,"records":[{"revision":"2a66f06c708c4b8280beeba38cc6dbd4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46024","aliases":[],"title":"libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()\n\nIf a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both\nprotocol and result, this is currently not treated as an error. In case\nof ac->negotiating == true and ac->protocol > 0, this leads to setting\nac->protocol = 0 and ac->ops = NULL. Thereafter, the check for\nac->protocol != protocol returns false, and init_protocol() is not\ncalled. Subsequently, ac->ops->handle_reply() is called, which leads to\na null pointer dereference, because ac->ops is still NULL.\n\nThis patch changes the check for ac->protocol != protocol to\n!ac->protocol, as this also includes the case when the protocol was set\nto zero in the message. This causes the message to be treated as\ncontaining a bad auth protocol.","state":0,"publishedAt":"2026-05-27T12:56:29.932+00:00","modifiedAt":"2026-10-19T19:26:41.575+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/ceph/auth.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"9ded62c302c0342efdb5eda3bf6e75720caad0df\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"f101271fcf55d7eacfefd610b51ec65f46ba8118\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"4b2738b93edad661178340239de657d876b73d3d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"927e4bd5692f2a4901808822981fb2c8d4456548\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"016bc663657366d386993f63eb31072eb45a2b77\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"8f2be7285941a33a9f72579a23b96392f83c758e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\",\n \"lessThan\": \"5199c125d25aeae8615c4fc31652cc0fe624338e\",\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/ceph/auth.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.34\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.34\",\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\": \"6.6.140\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.86\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.27\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.4\",\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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/9ded62c302c0342efdb5eda3bf6e75720caad0df","https://git.kernel.org/stable/c/f101271fcf55d7eacfefd610b51ec65f46ba8118","https://git.kernel.org/stable/c/4b2738b93edad661178340239de657d876b73d3d","https://git.kernel.org/stable/c/927e4bd5692f2a4901808822981fb2c8d4456548","https://git.kernel.org/stable/c/016bc663657366d386993f63eb31072eb45a2b77","https://git.kernel.org/stable/c/8f2be7285941a33a9f72579a23b96392f83c758e","https://git.kernel.org/stable/c/5199c125d25aeae8615c4fc31652cc0fe624338e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46024","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46024","identifiers":["CVE-2026-46024"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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