{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2025-39880","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-09-23T06:15:47.663","lastModified":"2026-10-19T21:10:00.160","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"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-\u003ev1 union member without\nchecking that the union member is active (i.e. msgr1 is in use).\n\nOn 64-bit systems, con-\u003ev1.auth_retry overlaps with con-\u003ev2.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-\u003ev1.connect_seq overlaps with con-\u003ev2.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."},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nlibceph: corrige accesos inválidos a ceph_connection_v1_info\n\nHay un lugar donde el código genérico en messenger.c está leyendo y otro lugar donde está escribiendo al miembro de la unión con-\u003ev1 sin verificar que el miembro de la unión esté activo (es decir, msgr1 está en uso).\n\nEn sistemas de 64 bits, con-\u003ev1.auth_retry se superpone con con-\u003ev2.out_iter, por lo que dicha lectura está casi garantizada para devolver un valor erróneo en lugar de 0 cuando msgr2 está en uso. Esto termina siendo bastante benigno porque el efecto secundario es solo la invalidación del autorizador y la obtención sucesiva de nuevos tickets.\n\ncon-\u003ev1.connect_seq se superpone con con-\u003ev2.conn_bufs y el hecho de que se esté escribiendo en él puede causar consecuencias más graves, pero afortunadamente no es algo que ocurra a menudo."}],"affected":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","affectedData":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ceph/messenger.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"ea12ab684f8ae8a6da11a22c78d94a79e2163096","versionType":"git","status":"affected"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"591ea9c30737663a471b2bb07b27ddde86b020d5","versionType":"git","status":"affected"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"23538cfbeed87159a5ac6c61e7a6de3d8d4486a8","versionType":"git","status":"affected"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983","versionType":"git","status":"affected"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"6bd8b56899be0b514945f639a89ccafb8f8dfaef","versionType":"git","status":"affected"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"cdbc9836c7afadad68f374791738f118263c5371","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ceph/messenger.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","versionType":"semver","status":"unaffected"},{"version":"5.15.194","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.153","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.107","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.48","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.16.8","lessThanOrEqual":"6.16.*","versionType":"semver","status":"unaffected"},{"version":"6.17","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-15T21:54:32.238506Z","id":"CVE-2025-39880","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA 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List","Third Party Advisory"]}]}}