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CVE-2019-19039

Estado: ModificadaMedia (5.5)—

** EN DISPUTA ** __btrfs_free_extent en fs / btrfs / extension-tree.c en el kernel de Linux hasta la versión 5.3.12 llama a btrfs_print_leaf en un caso ENOENT determinado, lo que permite a los usuarios locales obtener información potencialmente confidencial sobre los valores de registro a través del programa dmesg. NOTA: El equipo de desarrollo de BTRFS cuestiona estos problemas por no ser una vulnerabilidad porque “1) El núcleo proporciona facilidades para restringir el acceso a la opción dmesg - dmesg_restrict = 1 sysctl.

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Por lo tanto, depende realmente del administrador del sistema juzgar si el acceso a dmesg será rechazado o no. 2) WARN / WARN_ON son macros ampliamente utilizadas en el kernel de Linux. Si este CVE se considera válido, esto significaría que hay literalmente miles de CVE al acecho en el núcleo, algo que claramente no es el caso ".

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Canonical — Ubuntu LinuxDebian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2019-19039",
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        "cvssData": {
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          "baseScore": 1.9,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "obtainAllPrivilege": false,
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 3.6,
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  "affected": [
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      "affectedData": [
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  "published": "2019-11-21T02:15:23.337",
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  "vulnStatus": "Modified",
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          "value": "CWE-532"
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      "value": "__btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case."
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** __btrfs_free_extent en fs / btrfs / extension-tree.c en el kernel de Linux hasta la versión  5.3.12 llama a btrfs_print_leaf en un caso ENOENT determinado, lo que permite a los usuarios locales obtener información potencialmente confidencial sobre los valores de registro a través del programa dmesg. NOTA: El equipo de desarrollo de BTRFS cuestiona estos problemas por no ser una vulnerabilidad porque “1) El núcleo proporciona facilidades para restringir el acceso a la opción dmesg - dmesg_restrict = 1 sysctl. Por lo tanto, depende realmente del administrador del sistema juzgar si el acceso a dmesg será rechazado o no. 2) WARN / WARN_ON son macros ampliamente utilizadas en el kernel de Linux. Si este CVE se considera válido, esto significaría que hay literalmente miles de CVE al acecho en el núcleo, algo que claramente no es el caso \"."
    }
  ],
  "lastModified": "2026-06-17T02:26:01.793",
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