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CVE-2022-49833

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

btrfs: zoned: clone zoned device info when cloning a device

When cloning a btrfs_device, we're not cloning the associated btrfs_zoned_device_info structure of the device in case of a zoned filesystem.

Later on this leads to a NULL pointer dereference when accessing the device's zone_info for instance when setting a zone as active.

This was uncovered by fstests' testcase btrfs/161.

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 (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-49833",
  "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
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7365104236ade0bf22edd7724c8fd438b0342ee4",
              "lessThan": "ad88cabcec942c033f980cd1e28d56ecdaf5f3b8",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "7365104236ade0bf22edd7724c8fd438b0342ee4",
              "lessThan": "21e61ec6d0bb786818490e926aa9aeb4de95ad0d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/btrfs/volumes.c",
            "fs/btrfs/zoned.c",
            "fs/btrfs/zoned.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.0.9",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/btrfs/volumes.c",
            "fs/btrfs/zoned.c",
            "fs/btrfs/zoned.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-05-01T15:16:06.780",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/21e61ec6d0bb786818490e926aa9aeb4de95ad0d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ad88cabcec942c033f980cd1e28d56ecdaf5f3b8",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: clone zoned device info when cloning a device\n\nWhen cloning a btrfs_device, we're not cloning the associated\nbtrfs_zoned_device_info structure of the device in case of a zoned\nfilesystem.\n\nLater on this leads to a NULL pointer dereference when accessing the\ndevice's zone_info for instance when setting a zone as active.\n\nThis was uncovered by fstests' testcase btrfs/161."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: zoned: clonar información de dispositivo zonificado al clonar un dispositivo. Al clonar un btrfs_device, no se clona la estructura btrfs_zoned_device_info asociada al dispositivo en el caso de un sistema de archivos zonificado. Posteriormente, esto provoca una desreferencia de puntero nulo al acceder a zone_info del dispositivo, por ejemplo, al activar una zona. Esto fue descubierto por el caso de prueba btrfs/161 de fstests."
    }
  ],
  "lastModified": "2026-08-15T13:17:28.337",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}