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CVE-2026-98083

Estado: En análisisAlta (7)—

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

btrfs: fix transaction use-after-free in raid stripe insertion

If allocation of a RAID stripe extent fails, btrfs_insert_one_raid_extent() aborts and ends the transaction before returning -ENOMEM.

btrfs_finish_one_ordered(), the production caller through btrfs_insert_raid_extent(), still owns the transaction handle. It handles the error by aborting the transaction and then reaches the common exit path, which ends the transaction again.

The premature end can free the handle and drop its transaction reference. Transaction cleanup can then free the transaction before the caller's second abort accesses the handle and transaction, resulting in use-after-free.

Leer descripción completaMostrar menos

Keep the abort at the failure site, but let the caller's common exit path end the transaction once, after it has finished using both objects.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad local (AV:L, PR:L) en kernel Linux que permite escalada de privilegios mediante corrupción de memoria (use-after-free). Impacto de disponibilidad por potencial DoS.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

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-2026-98083",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "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": "ab69bf6f8970c09d3735c25094e9471d54365282",
              "lessThan": "089d9c45ea49ffffe55a8fe08d0ce2536626e90a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02c372e1f016e5113217597ab37b399c4e407477",
              "lessThan": "b185bdf30313e213fa1c887fe22fc3d513c061d9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02c372e1f016e5113217597ab37b399c4e407477",
              "lessThan": "2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02c372e1f016e5113217597ab37b399c4e407477",
              "lessThan": "b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02c372e1f016e5113217597ab37b399c4e407477",
              "lessThan": "a8813a923f9e43f788b357fb55c35f7f6ed6f98c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.6.130",
              "lessThan": "6.6.158",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/btrfs/raid-stripe-tree.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/btrfs/raid-stripe-tree.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-25T11:17:37.860",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/089d9c45ea49ffffe55a8fe08d0ce2536626e90a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a8813a923f9e43f788b357fb55c35f7f6ed6f98c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b185bdf30313e213fa1c887fe22fc3d513c061d9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Undergoing Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix transaction use-after-free in raid stripe insertion\n\nIf allocation of a RAID stripe extent fails,\nbtrfs_insert_one_raid_extent() aborts and ends the transaction before\nreturning -ENOMEM.\n\nbtrfs_finish_one_ordered(), the production caller through\nbtrfs_insert_raid_extent(), still owns the transaction handle. It handles\nthe error by aborting the transaction and then reaches the common exit\npath, which ends the transaction again.\n\nThe premature end can free the handle and drop its transaction reference.\nTransaction cleanup can then free the transaction before the caller's\nsecond abort accesses the handle and transaction, resulting in\nuse-after-free.\n\nKeep the abort at the failure site, but let the caller's common exit path\nend the transaction once, after it has finished using both objects."
    }
  ],
  "lastModified": "2026-10-03T11:18:30.077",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}