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CVE-2025-38269

Estado: AnalizadaMedia (5.5)—

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

btrfs: exit after state insertion failure at btrfs_convert_extent_bit()

If insert_state() state failed it returns an error pointer and we call extent_io_tree_panic() which will trigger a BUG() call. However if CONFIG_BUG is disabled, which is an uncommon and exotic scenario, then we fallthrough and call cache_state() which will dereference the error pointer, resulting in an invalid memory access.

So jump to the 'out' label after calling extent_io_tree_panic(), it also makes the code more clear besides dealing with the exotic scenario where CONFIG_BUG is disabled.

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-2025-38269",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "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": [
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      "affectedData": [
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "c91ea4bfa6dda549295ea7c15dfc990094d1fcd3",
              "lessThan": "58c50f45e1821a04d61b62514f9bd34afe67c622",
              "versionType": "git"
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            {
              "status": "affected",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
            {
              "status": "affected",
              "version": "6.7"
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              "status": "unaffected",
              "version": "0",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.34",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
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              "status": "unaffected",
              "version": "6.15.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/btrfs/extent-io-tree.c"
          ],
          "defaultStatus": "affected"
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      ]
    }
  ],
  "published": "2025-07-10T08:15:25.083",
  "references": [
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      "url": "https://git.kernel.org/stable/c/3bf179e36da917c5d9bec71c714573ed1649b7c1",
      "tags": [
        "Patch"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/58c50f45e1821a04d61b62514f9bd34afe67c622",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "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: exit after state insertion failure at btrfs_convert_extent_bit()\n\nIf insert_state() state failed it returns an error pointer and we call\nextent_io_tree_panic() which will trigger a BUG() call. However if\nCONFIG_BUG is disabled, which is an uncommon and exotic scenario, then\nwe fallthrough and call cache_state() which will dereference the error\npointer, resulting in an invalid memory access.\n\nSo jump to the 'out' label after calling extent_io_tree_panic(), it also\nmakes the code more clear besides dealing with the exotic scenario where\nCONFIG_BUG is disabled."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: salida tras fallo de inserción de estado en btrfs_convert_extent_bit(). Si el estado insert_state() falla, devuelve un puntero de error y se llama a extent_io_tree_panic(), lo que activa una llamada a BUG(). Sin embargo, si CONFIG_BUG está deshabilitado (un escenario inusual y exótico), se pasa a la siguiente etapa y se llama a cache_state(), lo que desreferencia el puntero de error, lo que resulta en un acceso no válido a memoria. Por lo tanto, al saltar a la etiqueta \"out\" después de llamar a extent_io_tree_panic(), se aclara el código, además de abordar el escenario exótico donde CONFIG_BUG está deshabilitado."
    }
  ],
  "lastModified": "2026-06-17T09:16:31.210",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FC7FC49C-1039-4539-9B46-E4246F6225B4",
              "versionEndExcluding": "6.12.34"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0541C761-BD5E-4C1A-8432-83B375D7EB92",
              "versionEndExcluding": "6.15.3",
              "versionStartIncluding": "6.13"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}