{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80561", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.767Z", "datePublished": "2026-08-26T14:37:26.572Z", "dateUpdated": "2026-08-26T14:37:26.572Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-26T14:37:26.572Z" }, "descriptions": [ { "lang": "en", "value": "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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ceph/cls_lock_client.c" ], "versions": [ { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "1ed45c8d96498725eb54f740172f9068d8673906", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "6265103e78f0ee7e2518de9cf938b94bee9700a0", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "3c3716dc06a34e4ca7f743f5fcfa07fbc5a11070", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "fa4aa86fff0c56799c2e3f51a88879053285f4a9", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "dbfd83f722a78446ec18a476ef7a38e52240b50a", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "d1bba38574d095f191557d397d9633f08cd966b1", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "51c8d238fe7236de627ab1a1433694552a904136", "status": "affected", "versionType": "git" }, { "version": "d4ed4a530562881cc5225050e42d96034f405aae", "lessThan": "437b6551cfcc235eea1d735a874f9d421f555e17", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ceph/cls_lock_client.c" ], "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.266", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.217", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.153", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.105", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.46", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.10.266" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.217" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.184" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.153" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12.105" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.18.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.1.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1ed45c8d96498725eb54f740172f9068d8673906" }, { "url": "https://git.kernel.org/stable/c/6265103e78f0ee7e2518de9cf938b94bee9700a0" }, { "url": "https://git.kernel.org/stable/c/3c3716dc06a34e4ca7f743f5fcfa07fbc5a11070" }, { "url": "https://git.kernel.org/stable/c/fa4aa86fff0c56799c2e3f51a88879053285f4a9" }, { "url": "https://git.kernel.org/stable/c/dbfd83f722a78446ec18a476ef7a38e52240b50a" }, { "url": "https://git.kernel.org/stable/c/d1bba38574d095f191557d397d9633f08cd966b1" }, { "url": "https://git.kernel.org/stable/c/51c8d238fe7236de627ab1a1433694552a904136" }, { "url": "https://git.kernel.org/stable/c/437b6551cfcc235eea1d735a874f9d421f555e17" } ], "title": "libceph: fix multiple unsafe decodes in decode_locker()", "x_generator": { "engine": "bippy-1.2.0" } } } }