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CVE-2026-98245

Estado: RecibidaSin puntuar—

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

btrfs: take commit root semaphore when iterating in mark_block_group_to_copy()

mark_block_group_to_copy() iterates over the commit root with skip_locking=true. A concurrent transaction commit can swap and free the commit root during iteration, causing use-after-free when accessing extent buffers.

Fix it by using path->need_commit_sem to protect the commit root search.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-98245",
  "cveTags": [],
  "metrics": {},
  "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": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
              "lessThan": "8e2007b263ea250251ec3021a0a197da990ee1a8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
              "lessThan": "709f6a5e986535005110c6c69b322f63631cb200",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
              "lessThan": "c32490c6d3f3a9f2d177d57c7eb8bbc347561d08",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "78ce9fc269af6e69c1399ab910ba6bc81c934f67",
              "lessThan": "0594e3423f4ba3137c734371169491f9a98e9af4",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/btrfs/dev-replace.c"
          ],
          "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": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/btrfs/dev-replace.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-06T09:18:12.643",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0594e3423f4ba3137c734371169491f9a98e9af4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/709f6a5e986535005110c6c69b322f63631cb200",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e2007b263ea250251ec3021a0a197da990ee1a8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c32490c6d3f3a9f2d177d57c7eb8bbc347561d08",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: take commit root semaphore when iterating in mark_block_group_to_copy()\n\nmark_block_group_to_copy() iterates over the commit root with\nskip_locking=true. A concurrent transaction commit can swap and free\nthe commit root during iteration, causing use-after-free when\naccessing extent buffers.\n\nFix it by using path->need_commit_sem to protect the commit root search."
    }
  ],
  "lastModified": "2026-10-06T09:18:12.643",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}