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CVE-2026-68348

Estado: RecibidaAlta (7.1)—

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

ASoC: tas2781: bound firmware description string parsing

The TAS2781 firmware parser reads several variable-length description strings with strlen() before checking that the string terminator is present inside the firmware blob. A malformed firmware image without a NUL terminator can therefore make the parser walk past the end of the firmware buffer before the later size checks run.

Add a small bounded string-length helper and use it for all description fields that are parsed from the firmware buffer. Keep the existing size checks for the fixed bytes that follow each string.

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 parser de firmware sin interacción. Buffer over-read por falta de validación de terminador NUL permite DoS (A:H) y lectura de memoria kernel (C:H).

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-2026-68348",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "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": "915f5eadebd29ba185ac506766a90120153b7e14",
              "lessThan": "3ddb0d3e36507615e5ef010a879357a54870adf5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "915f5eadebd29ba185ac506766a90120153b7e14",
              "lessThan": "0ec45e80a82785ee147516fdecf5c93707dec119",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "915f5eadebd29ba185ac506766a90120153b7e14",
              "lessThan": "41ae2b7d37c3dd82302167496836cca9f0328374",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "e75ef37d83c90b09bedb601624b47e168202b226",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "915f5eadebd29ba185ac506766a90120153b7e14",
              "lessThan": "bc889dfcea9294a1eae7f8e2f3573a90764ae4d0",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "sound/soc/codecs/tas2781-fmwlib.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "sound/soc/codecs/tas2781-fmwlib.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:26.723",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0ec45e80a82785ee147516fdecf5c93707dec119",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3ddb0d3e36507615e5ef010a879357a54870adf5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/41ae2b7d37c3dd82302167496836cca9f0328374",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bc889dfcea9294a1eae7f8e2f3573a90764ae4d0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e75ef37d83c90b09bedb601624b47e168202b226",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: tas2781: bound firmware description string parsing\n\nThe TAS2781 firmware parser reads several variable-length description\nstrings with strlen() before checking that the string terminator is\npresent inside the firmware blob. A malformed firmware image without a\nNUL terminator can therefore make the parser walk past the end of the\nfirmware buffer before the later size checks run.\n\nAdd a small bounded string-length helper and use it for all description\nfields that are parsed from the firmware buffer. Keep the existing size\nchecks for the fixed bytes that follow each string."
    }
  ],
  "lastModified": "2026-08-17T06:17:43.020",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}