{"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"}}]}}