{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68157", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.371Z", "datePublished": "2026-08-10T11:59:23.692Z", "dateUpdated": "2026-08-19T16:30:27.540Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:30:27.540Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: guard missing CRUSH type name lookup\n\nLocalized read selection can walk a parent bucket whose name exists in\nthe CRUSH map while its type has no matching entry in type_names.\nget_immediate_parent() then dereferences a NULL type_cn and passes an\ninvalid pointer into strcmp(), causing a null-ptr-deref.\n\nSkip such malformed parent buckets unless both the bucket name and type\nname metadata are present. This keeps malformed hierarchy data from\ncrashing locality lookup and safely falls back to \"not local\".\n\n[ idryomov: add WARN_ON_ONCE ]" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - Malformed CRUSH hierarchy data is delivered to the kernel Ceph client in CEPH_MSG_OSD_MAP over TCP from a monitor or OSD peer, stored in libceph, and later triggers get_immediate_parent() during localized-read target selection on RBD/CephFS client I/O.\nAC:L - A compromised or attacker-controlled Ceph monitor can publish an osdmap whose CRUSH buckets have names but missing type_names entries; once applied, the NULL dereference is reliably hit on subsequent localize-read calc_target() paths without further attacker-controlled timing.\nPR:N - Exploitation requires no privileges on the victim host; any machine acting as a kernel Ceph client that receives a forged osdmap from a cluster peer over the network can be attacked without local capabilities or user-namespace tricks.\nUI:N - No victim user action is needed at exploitation time beyond the host already being a Ceph client with localized reads enabled; forged osdmaps are applied automatically and the crash fires on subsequent kernel client read or map-rescan operations.\nS:U - Impact is confined to kernel memory on the Ceph client host (crash or potential escalation within that host); it does not cross VM, IOMMU, or sandbox boundaries to other security authorities.\nC:N - The failure is a NULL pointer dereference when accessing type_cn->cn_name; there is no out-of-bounds read, use-after-free, or other memory corruption that could disclose kernel data.\nI:N - The bug causes a NULL pointer dereference crash only; no attacker-controlled write, heap corruption, or control-flow hijack primitive is created by this defect.\nA:H - The NULL pointer dereference in get_immediate_parent() during CRUSH locality lookup causes a kernel oops or panic, denying all service on the affected Ceph client host." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ceph/osdmap.c" ], "versions": [ { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "cbfcba275326c8c7dae9acd8f4a0d4c316fdafb0", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "8ff579ac03d6e9d17d6d9c8443110167c14a382d", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "6a4b75d90f0cfbf22c14742ab35a803bc13f36ec", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "c46d82c47afc968d6ee8ef4470fa2dd35b765c21", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "3767c9f0c1bbd98dd25cb088356a0fc6c1f09f50", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "4716a64b7cc2797741f7be4e283ace78a9dff37d", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "db9cc9fd9660b2d69ee66f5a4cbec83c21a1c64d", "status": "affected", "versionType": "git" }, { "version": "117d96a04f007ce8fc2e292369056c3bd09f6f63", "lessThan": "bbeae12fda3384a90fbebc8a19ba9d33f85b5361", "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/osdmap.c" ], "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "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": "5.8", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cbfcba275326c8c7dae9acd8f4a0d4c316fdafb0" }, { "url": "https://git.kernel.org/stable/c/8ff579ac03d6e9d17d6d9c8443110167c14a382d" }, { "url": "https://git.kernel.org/stable/c/6a4b75d90f0cfbf22c14742ab35a803bc13f36ec" }, { "url": "https://git.kernel.org/stable/c/c46d82c47afc968d6ee8ef4470fa2dd35b765c21" }, { "url": "https://git.kernel.org/stable/c/3767c9f0c1bbd98dd25cb088356a0fc6c1f09f50" }, { "url": "https://git.kernel.org/stable/c/4716a64b7cc2797741f7be4e283ace78a9dff37d" }, { "url": "https://git.kernel.org/stable/c/db9cc9fd9660b2d69ee66f5a4cbec83c21a1c64d" }, { "url": "https://git.kernel.org/stable/c/bbeae12fda3384a90fbebc8a19ba9d33f85b5361" } ], "title": "libceph: guard missing CRUSH type name lookup", "x_generator": { "engine": "bippy-1.2.0" } } } }