CVE-2025-38549

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{}

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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."}], "id": "CVE-2025-38549", "lastModified": "2026-06-17T09:17:05.360", "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": "2025-08-16T12:15:31.003", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/64e135f1eaba0bbb0cdee859af3328c68d5b9789"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/816d36973467d1c9c08a48bdffe4675e219a2e84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e9fabe7036bb8be6071f39dc38605508f5f57b20"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: efivarfs: Fix memory leak of efivarfs_fs_info in fs_context error paths", "id": "2388922", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2388922"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nefivarfs: Fix memory leak of efivarfs_fs_info in fs_context error paths\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.\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."], "name": "CVE-2025-38549", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "2025-08-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38549\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38549\nhttps://lore.kernel.org/linux-cve-announce/2025081628-CVE-2025-38549-1e8e@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-08-18T20:50:10.788806+00:00", "updated": "2025-08-18T20:50:10.788859+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}