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CVE-2026-80751

Estado: RecibidaAlta (7.8)—

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

pmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()

mtk_mfg_attach_dev() reads prev_o on the first iteration of its loop, in "if (prev_o && prev_o->freq == o->freq)", before prev_o is assigned at the end of the loop body. On that first iteration, evaluating prev_o reads an indeterminate value. If it is non-NULL, the condition dereferences a stale or invalid pointer, potentially faulting or incorrectly skipping the first OPP.

Initialize prev_o to NULL. This matches the intent as well: there is no previous OPP to compare against on the first iteration.

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Found with Clang's -Wconditional-uninitialized.

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) sin interacción del usuario en núcleo Linux que causa lectura de memoria no inicializada, potenciando DoS o escalada local mediante manipulación de frecuencias OPP.

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-2026-80751",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "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": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "lessThan": "de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444",
              "lessThan": "090a95dbe13df9965279b588d97eda134831769c",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.19",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-03T13:06:14.770",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()\n\nmtk_mfg_attach_dev() reads prev_o on the first iteration of its loop,\nin \"if (prev_o && prev_o->freq == o->freq)\", before prev_o is assigned\nat the end of the loop body. On that first iteration, evaluating prev_o\nreads an indeterminate value. If it is non-NULL, the condition\ndereferences a stale or invalid pointer, potentially faulting or\nincorrectly skipping the first OPP.\n\nInitialize prev_o to NULL. This matches the intent as well: there is no\nprevious OPP to compare against on the first iteration.\n\nFound with Clang's -Wconditional-uninitialized."
    }
  ],
  "lastModified": "2026-09-04T05:17:15.100",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}