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CVE-2025-38243

Estado: AnalizadaMedia (5.5)—

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

btrfs: fix invalid inode pointer dereferences during log replay

In a few places where we call read_one_inode(), if we get a NULL pointer we end up jumping into an error path, or fallthrough in case of __add_inode_ref(), where we then do something like this:

which results in an invalid inode pointer that triggers an invalid memory access, resulting in a crash.

Fix this by making sure we don't do such dereferences.

Detalles técnicos trazas, registros y código del informe original
   iput(&inode->vfs_inode);

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)

Mostrar
{
  "id": "CVE-2025-38243",
  "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": "0502d1127436a69b8c2e7cf309ae0ebff3332668",
              "lessThan": "401d098f92ea69d8a75f8b845daf343e511681ba",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b4c50cbb01a1b6901d2b94469636dd80fa93de81",
              "lessThan": "ba8386d662cc51cc5382688bbf7a152b0b0b27cf",
              "versionType": "git"
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            {
              "status": "affected",
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              "lessThan": "2dcf838cf5c2f0f4501edaa1680fcad03618d760",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/btrfs/tree-log.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.15.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/btrfs/tree-log.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-07-09T11:15:26.350",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2dcf838cf5c2f0f4501edaa1680fcad03618d760",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/401d098f92ea69d8a75f8b845daf343e511681ba",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ba8386d662cc51cc5382688bbf7a152b0b0b27cf",
      "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: fix invalid inode pointer dereferences during log replay\n\nIn a few places where we call read_one_inode(), if we get a NULL pointer\nwe end up jumping into an error path, or fallthrough in case of\n__add_inode_ref(), where we then do something like this:\n\n   iput(&inode->vfs_inode);\n\nwhich results in an invalid inode pointer that triggers an invalid memory\naccess, resulting in a crash.\n\nFix this by making sure we don't do such dereferences."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: corrección de desreferencias de punteros inodos no válidos durante la reproducción de registros. En algunos casos, al ejecutar read_one_inode(), si se obtiene un puntero nulo, se accede a una ruta de error o a una ruta de paso en el caso de __add_inode_ref(). En este caso, se realiza algo como: iput(&inode->vfs_inode);, lo que genera un puntero inodo no válido que desencadena un acceso no válido a memoria y provoca un fallo. Para solucionar esto, es necesario asegurarse de no realizar dichas desreferencias."
    }
  ],
  "lastModified": "2026-06-17T09:16:27.990",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F4823E88-411C-4CCD-AA8D-3917D070E873",
              "versionEndExcluding": "6.15.5",
              "versionStartIncluding": "6.15"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*",
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            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "415BF58A-8197-43F5-B3D7-D1D63057A26E"
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}