{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42232", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.251Z", "datePublished": "2024-08-07T15:14:23.074Z", "dateUpdated": "2026-08-05T11:35:57.190Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:57.190Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix race between delayed_work() and ceph_monc_stop()\n\nThe way the delayed work is handled in ceph_monc_stop() is prone to\nraces with mon_fault() and possibly also finish_hunting(). Both of\nthese can requeue the delayed work which wouldn't be canceled by any of\nthe following code in case that happens after cancel_delayed_work_sync()\nruns -- __close_session() doesn't mess with the delayed work in order\nto avoid interfering with the hunting interval logic. This part was\nmissed in commit b5d91704f53e (\"libceph: behave in mon_fault() if\ncur_mon < 0\") and use-after-free can still ensue on monc and objects\nthat hang off of it, with monc->auth and monc->monmap being\nparticularly susceptible to quickly being reused.\n\nTo fix this:\n\n- clear monc->cur_mon and monc->hunting as part of closing the session\n in ceph_monc_stop()\n- bail from delayed_work() if monc->cur_mon is cleared, similar to how\n it's done in mon_fault() and finish_hunting() (based on monc->hunting)\n- call cancel_delayed_work_sync() after the session is closed" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - Both paths that re-arm the delayed work — `mon_fault()` via `con_fault()` on any socket error/RST, and `finish_hunting()` on a monitor auth reply — are driven entirely by the remote Ceph monitor over TCP, and the attacker can also force the teardown by making the mon session fail so the mount times out into `destroy_fs_client()`. No local access to the target is needed for the attacker's contribution.\nAC:L - The attacker controls both sides of the race: it drives connection faults at an arbitrary rate and induces the `ceph_monc_stop()` teardown by refusing/resetting the session, and the window is amplified because `mon_fault()` holds `monc->mutex` while `ceph_monc_stop()` blocks on it after the cancel has already run. The attempt is free and infinitely repeatable across mount/unmount cycles.\nPR:N - The attacker is an unauthenticated remote peer — `con_fault()` fires on socket errors before any cephx authentication succeeds, and the monitor is the entity the client authenticates *to*, so no credentials on the victim host are required.\nUI:N - No victim action is needed beyond normal, automated cluster operation — ceph-csi/Kubernetes, autofs and systemd mount units perform cephfs/rbd mount, unmount and retry cycles continuously without human involvement, and each failed or torn-down session is an exploitation attempt.\nS:U - The use-after-free corrupts kernel heap memory and executes within the kernel's own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Use-after-free on `ceph_client`/`ceph_mon_client`, `ceph_auth_client` and `ceph_monmap`, with `pick_new_mon()` indexing `monc->monmap->mon_inst[monc->cur_mon]` using a base pointer and index both read from freed, attacker-groomable memory — an out-of-bounds read primitive usable for kernel memory disclosure.\nI:H - `ceph_auth_is_authenticated()` performs `ac->ops->is_authenticated(ac)`, an indirect call through a function pointer read from a freed slab object the remote monitor can reclaim during the multi-second delay, giving control-flow hijack; `mutex_lock()` and `mod_delayed_work()` additionally write timer/work state into the freed-and-reused allocation.\nA:H - The delayed work executing on freed memory reliably oopses, and `BUG_ON(monc->monmap->num_mon < 1)` in `pick_new_mon()` panics the kernel outright when the freed monmap is reused." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ceph/mon_client.c" ], "versions": [ { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "1177afeca833174ba83504688eec898c6214f4bf", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "63e5d035e3a7ab7412a008f202633c5e6a0a28ea", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "34b76d1922e41da1fa73d43b764cddd82ac9733c", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "20cf67dcb7db842f941eff1af6ee5e9dc41796d7", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "2d33654d40a05afd91ab24c9a73ab512a0670a9a", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "9525af1f58f67df387768770fcf6d6a8f23aee3d", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "33d38c5da17f8db2d80e811b7829d2822c10625e", "status": "affected", "versionType": "git" }, { "version": "0e04dc26cc594d31ee6b1382b452b6bc83b57937", "lessThan": "69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883", "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/mon_client.c" ], "versions": [ { "version": "4.6", "status": "affected" }, { "version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.318", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.280", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.222", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.163", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.100", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.41", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.10", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "4.6", "versionEndExcluding": "4.19.318" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.4.280" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.10.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.100" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.41" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.9.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1177afeca833174ba83504688eec898c6214f4bf" }, { "url": "https://git.kernel.org/stable/c/63e5d035e3a7ab7412a008f202633c5e6a0a28ea" }, { "url": "https://git.kernel.org/stable/c/34b76d1922e41da1fa73d43b764cddd82ac9733c" }, { "url": "https://git.kernel.org/stable/c/20cf67dcb7db842f941eff1af6ee5e9dc41796d7" }, { "url": "https://git.kernel.org/stable/c/2d33654d40a05afd91ab24c9a73ab512a0670a9a" }, { "url": "https://git.kernel.org/stable/c/9525af1f58f67df387768770fcf6d6a8f23aee3d" }, { "url": "https://git.kernel.org/stable/c/33d38c5da17f8db2d80e811b7829d2822c10625e" }, { "url": "https://git.kernel.org/stable/c/69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883" } ], "title": "libceph: fix race between delayed_work() and ceph_monc_stop()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42232", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:14:16.994766Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:32.623Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:02:36.305Z" } } ] } }