{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-80561", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80561", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-26T14:37:26.572Z", "updatedAt": "2026-10-16T19:26:27.238Z", "importedAt": "2026-10-24T01:58:30.346Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "libceph: fix multiple unsafe decodes in decode_locker()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix multiple unsafe decodes in decode_locker()\n\ndecode_locker() in cls_lock_client.c contains three unsafe decode\noperations that allow a malicious or compromised OSD to trigger\nslab-out-of-bounds reads:\n\n1. ceph_decode_copy() at the locker_id_t name field has no preceding\n bounds check. With p == end after ceph_start_decoding() accepts\n struct_len=0, this reads sizeof(ceph_entity_name) = 9 bytes past\n the validated buffer boundary.\n\n2. *p += sizeof(struct ceph_timespec) after the locker_info_t header\n is an unchecked pointer advance. A malicious OSD can position p\n past end, causing all subsequent _safe checks to pass against a\n bogus boundary.\n\n3. len = ceph_decode_32(p) has no preceding bounds check, and the\n immediately following *p += len is uncapped. A malicious OSD can\n send len=0xffffffff, advancing p gigabytes past end and escaping\n the decode window entirely.\n\nFix all three by replacing bare operations with their safe variants:\n ceph_decode_copy -> ceph_decode_copy_safe\n *p += sizeof(...) -> ceph_decode_skip_n\n ceph_decode_32(p) -> ceph_decode_32_safe\n *p += len -> ceph_decode_skip_n\n\nA new label is added to return -EINVAL on any bounds violation.\n-EINVAL is appropriate here: the data received from the OSD\nis structurally malformed, which is an invalid argument to the decode\ncontract regardless of whether the caller or the wire is at fault.\n\nAttacker model: a malicious or compromised OSD in a multi-tenant Ceph\ndeployment can trigger this against any kernel client that issues the\nlock.get_info class method (e.g. during RBD exclusive lock acquisition)\nwithout any further privileges beyond OSD session establishment.\n\n[ idryomov: use ceph_decode_skip_string() to skip description, trim\n changelog ]", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "1ed45c8d96498725eb54f740172f9068d8673906" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "6265103e78f0ee7e2518de9cf938b94bee9700a0" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "3c3716dc06a34e4ca7f743f5fcfa07fbc5a11070" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "fa4aa86fff0c56799c2e3f51a88879053285f4a9" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "dbfd83f722a78446ec18a476ef7a38e52240b50a" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "d1bba38574d095f191557d397d9633f08cd966b1" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "51c8d238fe7236de627ab1a1433694552a904136" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "status": "affected", "versionType": "git", "lessThan": "437b6551cfcc235eea1d735a874f9d421f555e17" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.9" }, { "version": "5.10.266", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.217", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.184", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.153", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.105", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.46", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.10", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }