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Esto sucede porque en btrfs_load_zone_info() extraemos un dispositivo del mapa de fragmentos en una variable local y luego usamos el dispositivo mientras no est\u00e1 bajo la protecci\u00f3n del dispositivo y reemplazamos rwsem. Entonces, si se produce una operaci\u00f3n de reemplazo de dispositivo cuando extraemos el dispositivo y ese dispositivo es la fuente de la operaci\u00f3n de reemplazo, activaremos un use-after-free si antes de terminar de usar el dispositivo la operaci\u00f3n de reemplazo finaliza y libera el dispositivo. Solucione este problema ampliando la secci\u00f3n cr\u00edtica bajo la protecci\u00f3n del dispositivo y reemplace rwsem para que todos los usos del dispositivo se realicen dentro de la secci\u00f3n cr\u00edtica."}], "id": "CVE-2024-39496", "lastModified": "2026-01-06T15:07:04.700", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "[email protected]", "type": "Primary"}]}, "published": "2024-07-12T13:15:12.253", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "[email protected]", "type": "Primary"}]}

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