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Ambos pueden volver a poner en cola el trabajo retrasado que no ser\u00eda cancelado por ninguno de los siguientes c\u00f3digos en caso de que eso suceda despu\u00e9s de que se ejecute cancel_delayed_work_sync() - __close_session() no interfiere con el trabajo retrasado para evitar interferir con la b\u00fasqueda l\u00f3gica de intervalo. Esta parte se omiti\u00f3 en el commit b5d91704f53e (\"libceph: comportarse en mon_fault() si cur_mon &lt; 0\") y el use-after-free a\u00fan puede producirse en monc y los objetos que cuelgan de \u00e9l, con monc-&gt;auth y monc-&gt; monmap es particularmente susceptible de ser reutilizado r\u00e1pidamente. Para solucionar esto: - borre monc-&gt;cur_mon y monc-&gt;hunting como parte del cierre de la sesi\u00f3n en ceph_monc_stop() - libere de delay_work() si monc-&gt;cur_mon est\u00e1 borrado, similar a como se hace en mon_fault() y Finish_hunting () (basado en monc-&gt;hunting): llame a cancel_delayed_work_sync() despu\u00e9s de cerrar la sesi\u00f3n"}], "id": "CVE-2024-42232", "lastModified": "2025-11-03T22:17:46.643", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-08-07T16:15:46.213", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1177afeca833174ba83504688eec898c6214f4bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/20cf67dcb7db842f941eff1af6ee5e9dc41796d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d33654d40a05afd91ab24c9a73ab512a0670a9a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33d38c5da17f8db2d80e811b7829d2822c10625e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34b76d1922e41da1fa73d43b764cddd82ac9733c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/63e5d035e3a7ab7412a008f202633c5e6a0a28ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9525af1f58f67df387768770fcf6d6a8f23aee3d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: libceph: fix race between delayed_work() and ceph_monc_stop()", "id": "2303500", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2303500"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nlibceph: fix race between delayed_work() and ceph_monc_stop()\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.\nTo fix this:\n- clear monc->cur_mon and monc->hunting as part of closing the session\nin ceph_monc_stop()\n- bail from delayed_work() if monc->cur_mon is cleared, similar to how\nit's done in mon_fault() and finish_hunting() (based on monc->hunting)\n- call cancel_delayed_work_sync() after the session is closed", "A race condition vulnerability was found in the Linux kernel. Delayed work in ceph_monc_stop() is prone to race with mon_fault() and finish_hunting(), resulting in a denial of service."], "name": "CVE-2024-42232", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42232\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42232\nhttps://lore.kernel.org/linux-cve-announce/2024080737-CVE-2024-42232-8ab2@gregkh/T"], "threat_severity": "Moderate"}

{}