{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-52954", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.372Z", "datePublished": "2026-06-24T16:28:36.992Z", "dateUpdated": "2026-08-05T12:32:04.179Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:32:04.179Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: handle rbtree insertion error in decode_choose_args()\n\nA message of type CEPH_MSG_OSD_MAP contains an OSD map that itself\ncontains a CRUSH map. The received CRUSH map may optionally contain\nchoose_args that get decoded in decode_choose_args(). In this function,\nnum_choose_arg_maps is read from the message, and a corresponding number\nof crush_choose_arg_maps gets decoded afterwards. Each\ncrush_choose_arg_map has a choose_args_index, which serves as the key\nwhen inserting it into the choose_args rbtree of the decoded crush_map.\nIf a (potentially corrupted) message contains two crush_choose_arg_maps\nwith the same index, the assertion in insert_choose_arg_map() triggers a\nkernel BUG when trying to insert the second crush_choose_arg_map.\n\nThis patch fixes the issue by switching to the non-asserting rbtree\ninsertion function and rejecting the message if the insertion fails.\n\n[ idryomov: changelog ]" } ], "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 - The vulnerable decoder processes CEPH_MSG_OSD_MAP data received over the Ceph network protocol from monitor or OSD peers.\nAC:L - An attacker controlling an accepted Ceph peer can deterministically include two choose_arg_maps with the same choose_args_index; no race or special memory state is required.\nPR:N - In the highest reasonable scenario, a malicious or compromised Ceph cluster endpoint sends the malformed map to an already connected client and needs no privileges on the victim system.\nUI:N - OSD map updates are processed asynchronously by the kernel client after the Ceph session exists; no victim action is needed to process the malicious message.\nS:U - The impact is within the same kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:N - The bug triggers a BUG() assertion on duplicate rbtree insertion and does not provide an information disclosure primitive.\nI:N - The vulnerable path does not perform attacker-controlled memory corruption; it aborts via BUG() before creating an integrity-impacting primitive.\nA:H - The duplicate choose_args_index triggers a kernel BUG/oops in the Ceph client decode path, causing a high-impact denial of service." } ] } ], "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": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "c7bf7864e2924fa5508ac270b0e9364bc13d5a6c", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "f47430fc1f815e87406e2d3b4e476eff1bc7fd9b", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "0b6a3bcb91bc5bfeda39f0df3b71bab62c13e9da", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "534ebc08df97c47d4c7596f336fa31ecbf91519c", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "80c73bd1b2b04355d1d0c29be8ccbd25a380905d", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "4d2b37abda9536808655830d683dc491d31741a8", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "0a1265a9ab875f92b6a3ffb497404f46cf9d76a3", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "d289478cfc0bcf81c7914200d6abdcb78bd04ded", "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": "4.13", "status": "affected" }, { "version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "4.13", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c7bf7864e2924fa5508ac270b0e9364bc13d5a6c" }, { "url": "https://git.kernel.org/stable/c/f47430fc1f815e87406e2d3b4e476eff1bc7fd9b" }, { "url": "https://git.kernel.org/stable/c/0b6a3bcb91bc5bfeda39f0df3b71bab62c13e9da" }, { "url": "https://git.kernel.org/stable/c/534ebc08df97c47d4c7596f336fa31ecbf91519c" }, { "url": "https://git.kernel.org/stable/c/80c73bd1b2b04355d1d0c29be8ccbd25a380905d" }, { "url": "https://git.kernel.org/stable/c/4d2b37abda9536808655830d683dc491d31741a8" }, { "url": "https://git.kernel.org/stable/c/0a1265a9ab875f92b6a3ffb497404f46cf9d76a3" }, { "url": "https://git.kernel.org/stable/c/d289478cfc0bcf81c7914200d6abdcb78bd04ded" } ], "title": "libceph: handle rbtree insertion error in decode_choose_args()", "x_generator": { "engine": "bippy-1.2.0" } } } }