{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-22991", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.937Z", "datePublished": "2026-01-23T15:24:12.191Z", "dateUpdated": "2026-08-05T12:19:59.064Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:19:59.064Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: make free_choose_arg_map() resilient to partial allocation\n\nfree_choose_arg_map() may dereference a NULL pointer if its caller fails\nafter a partial allocation.\n\nFor example, in decode_choose_args(), if allocation of arg_map->args\nfails, execution jumps to the fail label and free_choose_arg_map() is\ncalled. Since arg_map->size is updated to a non-zero value before memory\nallocation, free_choose_arg_map() will iterate over arg_map->args and\ndereference a NULL pointer.\n\nTo prevent this potential NULL pointer dereference and make\nfree_choose_arg_map() more resilient, add checks for pointers before\niterating." } ], "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 is reached through Ceph `CEPH_MSG_OSD_MAP` messages received over the network from monitor or OSD peers. A remote peer that can supply a crafted OSD/CRUSH map can drive execution into `decode_choose_args()` and `free_choose_arg_map()`.\nAC:L - There is no race or timing requirement; the attacker controls the encoded CRUSH choose-arg sizes and can force allocation failure with oversized fields. Cleanup then deterministically dereferences a NULL `args` or `weight_set` pointer in the vulnerable code.\nPR:N - The attacker needs no local privileges on the vulnerable kernel host, and Ceph deployments can use auth-none/no-key configurations or process maps from a malicious configured peer. When uncertain between authentication-dependent and unauthenticated deployments, the higher severity PR:N is selected.\nUI:N - Once a CephFS/RBD/libceph client is connected, OSD maps are processed asynchronously by the kernel networking/messenger path. No additional victim action is needed for a remote peer to deliver the crafted map.\nS:U - The impact is within the vulnerable kernel client host and does not cross a separate security authority such as a hypervisor, VM boundary, or IOMMU boundary. This is a standard kernel availability impact with unchanged scope.\nC:N - The fixed flaw is a NULL pointer dereference during error cleanup after partial allocation failure. It does not provide an attacker-controlled memory read primitive.\nI:N - The direct vulnerable operation is dereferencing NULL in cleanup, not an out-of-bounds write, UAF, or controlled write. No integrity-modifying primitive is exposed by this fix.\nA:H - A NULL pointer dereference in kernel context can oops or panic the system, and the crafted map can be sent repeatedly by the remote peer. This is a high availability impact." } ] } ], "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": "9b3730dabcf3764bfe3ff07caf55e641a0b45234", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "851241d3f78a5505224dc21c03d8692f530256b4", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "ec1850f663da64842614c86b20fe734be070c2ba", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "8081faaf089db5280c3be820948469f7c58ef8dd", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "f21c3fdb96833aac2f533506899fe38c19cf49d5", "status": "affected", "versionType": "git" }, { "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c", "lessThan": "e3fe30e57649c551757a02e1cad073c47e1e075e", "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": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.161", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.121", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.66", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.6", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.1.161" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.6.121" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234" }, { "url": "https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4" }, { "url": "https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba" }, { "url": "https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd" }, { "url": "https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf" }, { "url": "https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5" }, { "url": "https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e" } ], "title": "libceph: make free_choose_arg_map() resilient to partial allocation", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-16T20:35:31.087945Z", "id": "CVE-2026-22991", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T20:35:39.173Z" } } ] } }