CVE-2025-38549

{"id": "CVE-2025-38549", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-08-16T12:15:31.003", "references": [{"url": "https://git.kernel.org/stable/c/64e135f1eaba0bbb0cdee859af3328c68d5b9789", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/816d36973467d1c9c08a48bdffe4675e219a2e84", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e9fabe7036bb8be6071f39dc38605508f5f57b20", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nefivarfs: Fix memory leak of efivarfs_fs_info in fs_context error paths\n\nWhen processing mount options, efivarfs allocates efivarfs_fs_info (sfi)\nearly in fs_context initialization. However, sfi is associated with the\nsuperblock and typically freed when the superblock is destroyed. If the\nfs_context is released (final put) before fill_super is called\u2014such as\non error paths or during reconfiguration\u2014the sfi structure would leak,\nas ownership never transfers to the superblock.\n\nImplement the .free callback in efivarfs_context_ops to ensure any\nallocated sfi is properly freed if the fs_context is torn down before\nfill_super, preventing this memory leak."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: efivarfs: corrige la p\u00e9rdida de memoria de efivarfs_fs_info en las rutas de error de fs_context Al procesar las opciones de montaje, efivarfs asigna efivarfs_fs_info (sfi) al principio de la inicializaci\u00f3n de fs_context. Sin embargo, sfi est\u00e1 asociado al superbloque y normalmente se libera cuando este se destruye. Si se libera fs_context (posici\u00f3n final) antes de llamar a fill_super (como en rutas de error o durante la reconfiguraci\u00f3n), la estructura sfi se filtrar\u00eda, ya que la propiedad nunca se transfiere al superbloque. Implementa la devoluci\u00f3n de llamada .free en efivarfs_context_ops para garantizar que cualquier sfi asignado se libere correctamente si fs_context se derriba antes que fill_super, lo que previene esta p\u00e9rdida de memoria."}], "lastModified": "2025-11-18T18:10:21.467", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0099D5A4-B157-4D36-8858-982C7D579030", "versionEndExcluding": "6.12.40", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C7AFE5B0-F3B1-4D30-B8BF-EDA0385C4746", "versionEndExcluding": "6.15.8", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6D4894DB-CCFE-4602-B1BF-3960B2E19A01"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "09709862-E348-4378-8632-5A7813EDDC86"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "415BF58A-8197-43F5-B3D7-D1D63057A26E"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A0517869-312D-4429-80C2-561086E1421C"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "85421F4E-C863-4ABF-B4B4-E887CC2F7F92"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3827F0D4-5FEE-4181-B267-5A45E7CA11FC"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}