CVE-2024-38570

{"id": "CVE-2024-38570", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-06-19T14:15:17.153", "references": [{"url": "https://git.kernel.org/stable/c/0636b34b44589b142700ac137b5f69802cfe2e37", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/501cd8fabf621d10bd4893e37f6ce6c20523c8ca", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d98779e687726d8f8860f1c54b5687eec5f63a73", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Fix potential glock use-after-free on unmount\n\nWhen a DLM lockspace is released and there ares still locks in that\nlockspace, DLM will unlock those locks automatically. Commit\nfb6791d100d1b started exploiting this behavior to speed up filesystem\nunmount: gfs2 would simply free glocks it didn't want to unlock and then\nrelease the lockspace. This didn't take the bast callbacks for\nasynchronous lock contention notifications into account, which remain\nactive until until a lock is unlocked or its lockspace is released.\n\nTo prevent those callbacks from accessing deallocated objects, put the\nglocks that should not be unlocked on the sd_dead_glocks list, release\nthe lockspace, and only then free those glocks.\n\nAs an additional measure, ignore unexpected ast and bast callbacks if\nthe receiving glock is dead."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: gfs2: soluciona el posible use-after-free de glock al desmontar Cuando se libera un espacio de bloqueo de DLM y todav\u00eda hay bloqueos en ese espacio de bloqueo, DLM desbloquear\u00e1 esos bloqueos autom\u00e1ticamente. El commit fb6791d100d1b comenz\u00f3 a explotar este comportamiento para acelerar el desmontaje del sistema de archivos: gfs2 simplemente liberar\u00eda las glocks que no quer\u00eda desbloquear y luego liberar\u00eda el espacio de bloqueo. Esto no tuvo en cuenta las devoluciones de llamada de bast para notificaciones de contenci\u00f3n de bloqueo asincr\u00f3nicas, que permanecen activas hasta que se desbloquea un bloqueo o se libera su espacio de bloqueo. Para evitar que esas devoluciones de llamada accedan a objetos desasignados, coloque las glocks que no deben desbloquearse en la lista sd_dead_glocks, libere el espacio de bloqueo y solo entonces libere esas glocks. Como medida adicional, ignore las devoluciones de llamada inesperadas de ast y bast si la glock receptora est\u00e1 muerta."}], "lastModified": "2024-08-01T20:25:42.533", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CFD35FD5-8F34-4C7B-803E-84957DD73AFF", "versionEndExcluding": "6.6.33", "versionStartIncluding": "3.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "80550309-67AB-4FD1-AC07-3DED5C4F01B2", "versionEndExcluding": "6.8.12", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E07124C1-19E8-4D21-828D-9932A01D3011", "versionEndExcluding": "6.9.3", "versionStartIncluding": "6.9"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}