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{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: fix wait/cancellation handling during remove\n\nBen Greear further reports deadlocks during concurrent debugfs\nremove while files are being accessed, even though the code in\nquestion now uses debugfs cancellations. Turns out that despite\nall the review on the locking, we missed completely that the\nlogic is wrong: if the refcount hits zero we can finish (and\nneed not wait for the completion), but if it doesn't we have\nto trigger all the cancellations. As written, we can _never_\nget into the loop triggering the cancellations. Fix this, and\nexplain it better while at it."}, {"lang": "es", "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: debugfs: corrige el manejo de espera/cancelaci\u00f3n durante la eliminaci\u00f3n Ben Greear informa adem\u00e1s bloqueos durante la eliminaci\u00f3n de debugfs concurrentes mientras se accede a los archivos, aunque el c\u00f3digo en cuesti\u00f3n ahora usa cancelaciones de debugfs. Resulta que a pesar de toda la revisi\u00f3n sobre el bloqueo, no entendimos por completo que la l\u00f3gica es incorrecta: si el recuento llega a cero, podemos finalizar (y no necesitamos esperar a que se complete), pero si no es as\u00ed, tenemos que activar todos los cancelaciones. Tal como est\u00e1 escrito, _nunca_ podemos entrar en el ciclo que desencadena las cancelaciones. Arregla esto y expl\u00edcalo mejor mientras lo haces."}], "id": "CVE-2024-35793", "lastModified": "2024-11-21T09:20:54.497", "metrics": {}, "published": "2024-05-17T13:15:59.023", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: debugfs: fix wait/cancellation handling during remove", "id": "2281047", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281047"}, "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-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndebugfs: fix wait/cancellation handling during remove\nBen Greear further reports deadlocks during concurrent debugfs\nremove while files are being accessed, even though the code in\nquestion now uses debugfs cancellations. Turns out that despite\nall the review on the locking, we missed completely that the\nlogic is wrong: if the refcount hits zero we can finish (and\nneed not wait for the completion), but if it doesn't we have\nto trigger all the cancellations. As written, we can _never_\nget into the loop triggering the cancellations. Fix this, and\nexplain it better while at it.", "A flaw was found in the debugfs module in the Linux kernel. A deadlock can be triggered when files are removed and accessed, resulting in a denial of service."], "name": "CVE-2024-35793", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35793\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35793\nhttps://lore.kernel.org/linux-cve-announce/2024051709-CVE-2024-35793-6171@gregkh/T"], "statement": "The debugfs module in the Linux kernel as shipped in Red Hat Enterprise Linux 8 and 9 is not affected by this vulnerability because the vulnerable code was introduced in a newer version of the Linux kernel.", "threat_severity": "Moderate"}