{"id":"CVE-2025-39880","revision":null,"records":[{"revision":"abdc9e25ae70437a86b110bae39521f6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-39880","aliases":[],"title":"libceph: fix invalid accesses to ceph_connection_v1_info","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix invalid accesses to ceph_connection_v1_info\n\nThere is a place where generic code in messenger.c is reading and\nanother place where it is writing to con->v1 union member without\nchecking that the union member is active (i.e. msgr1 is in use).\n\nOn 64-bit systems, con->v1.auth_retry overlaps with con->v2.out_iter,\nso such a read is almost guaranteed to return a bogus value instead of\n0 when msgr2 is in use. This ends up being fairly benign because the\nside effect is just the invalidation of the authorizer and successive\nfetching of new tickets.\n\ncon->v1.connect_seq overlaps with con->v2.conn_bufs and the fact that\nit's being written to can cause more serious consequences, but luckily\nit's not something that happens often.","state":0,"publishedAt":"2025-09-23T06:00:49.897+00:00","modifiedAt":"2026-10-15T22:02:32.742+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/messenger.c\"\n ],\n \"versions\": [\n {\n \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n \"lessThan\": \"ea12ab684f8ae8a6da11a22c78d94a79e2163096\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n \"lessThan\": \"591ea9c30737663a471b2bb07b27ddde86b020d5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n \"lessThan\": \"23538cfbeed87159a5ac6c61e7a6de3d8d4486a8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n \"lessThan\": \"35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n \"lessThan\": \"6bd8b56899be0b514945f639a89ccafb8f8dfaef\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd1a677cad994021b19665ed476aea63f5d54f31\",\n \"lessThan\": \"cdbc9836c7afadad68f374791738f118263c5371\",\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/messenger.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.194\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.153\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.107\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.48\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.16.8\",\n \"lessThanOrEqual\": \"6.16.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.17\",\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:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/ea12ab684f8ae8a6da11a22c78d94a79e2163096","https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5","https://git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8","https://git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983","https://git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef","https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39880","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-39880","identifiers":["CVE-2025-39880"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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