FKIE_CVE-2024-39496

Vulnerability from fkie_nvd - Published: 2024-07-12 13:15 - Updated: 2026-08-04 11:19
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix use-after-free due to race with dev replace While loading a zone's info during creation of a block group, we can race with a device replace operation and then trigger a use-after-free on the device that was just replaced (source device of the replace operation). This happens because at btrfs_load_zone_info() we extract a device from the chunk map into a local variable and then use the device while not under the protection of the device replace rwsem. So if there's a device replace operation happening when we extract the device and that device is the source of the replace operation, we will trigger a use-after-free if before we finish using the device the replace operation finishes and frees the device. Fix this by enlarging the critical section under the protection of the device replace rwsem so that all uses of the device are done inside the critical section.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.htmlMailing List, Third Party Advisory
Impacted products
Vendor Product Version
debian debian_linux 11.0
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/zoned.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "17765964703b88d8befd899f8501150bb7e07e43",
              "status": "affected",
              "version": "5b316468983dfa9473ff0f1c42e4e30b4c267141",
              "versionType": "git"
            },
            {
              "lessThan": "092571ef9a812566c8f2c9038d9c2a64c49788d6",
              "status": "affected",
              "version": "5b316468983dfa9473ff0f1c42e4e30b4c267141",
              "versionType": "git"
            },
            {
              "lessThan": "a0cc006f4214b87e70983c692e05bb36c59b5752",
              "status": "affected",
              "version": "5b316468983dfa9473ff0f1c42e4e30b4c267141",
              "versionType": "git"
            },
            {
              "lessThan": "0090d6e1b210551e63cf43958dc7a1ec942cdde9",
              "status": "affected",
              "version": "5b316468983dfa9473ff0f1c42e4e30b4c267141",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/zoned.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5A8C21E9-F184-4280-95B0-1754A2DEC1EE",
              "versionEndExcluding": "6.1.95",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.9.6",
              "versionStartIncluding": "6.7",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: fix use-after-free due to race with dev replace\n\nWhile loading a zone\u0027s info during creation of a block group, we can race\nwith a device replace operation and then trigger a use-after-free on the\ndevice that was just replaced (source device of the replace operation).\n\nThis happens because at btrfs_load_zone_info() we extract a device from\nthe chunk map into a local variable and then use the device while not\nunder the protection of the device replace rwsem. So if there\u0027s a device\nreplace operation happening when we extract the device and that device\nis the source of the replace operation, we will trigger a use-after-free\nif before we finish using the device the replace operation finishes and\nfrees the device.\n\nFix this by enlarging the critical section under the protection of the\ndevice replace rwsem so that all uses of the device are done inside the\ncritical section."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs:zoned: corrige el use-after-free debido a la ejecuci\u00f3n con el reemplazo de desarrollo. Mientras cargamos la informaci\u00f3n de una zona durante la creaci\u00f3n de un grupo de bloques, podemos ejecutar una operaci\u00f3n de reemplazo de dispositivo y luego activar un use-after-free en el dispositivo que acaba de ser reemplazado (dispositivo fuente de la operaci\u00f3n de reemplazo). 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": "2026-08-04T11:19:00.993",
  "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
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          "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-39496",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T17:07:26.275755Z",
          "version": "2.0.3"
        }
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    ]
  },
  "published": "2024-07-12T13:15:12.253",
  "references": [
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      "tags": [
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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