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CVE-2026-89943

Estado: RecibidaAlta (8.4)—

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

ASoC: loongson: Fix error handling in ACPI property parsing

In loongson_card_parse_acpi(), the return value of device_property_read_string() for the `codec-dai-name` property was ignored. If the property is missing or invalid, an uninitialized pointer would be used later, potentially leading to undefined behavior.

Fix this by checking the return value and propagating the error appropriately.

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 sin privilegios (AV:L, PR:N) en el kernel de Linux por manejo defectuoso de errores de parseo ACPI, causando comportamiento indefinido que puede llevar a DoS o lectura de memoria no inicializada.

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-2026-89943",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.4,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "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": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "lessThan": "682c123cef455545f48ecbe74b3872fa303bf58f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "lessThan": "4e580d84a638f007b5b68d50d7633de502f325e7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "lessThan": "bb1602908c67db7197ab001638573262bccc6ca2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "lessThan": "0eb0e3c623ac1da8b85d518043fef7660af7805d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "sound/soc/loongson/loongson_card.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "sound/soc/loongson/loongson_card.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-16T11:17:03.993",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0eb0e3c623ac1da8b85d518043fef7660af7805d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4e580d84a638f007b5b68d50d7633de502f325e7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/682c123cef455545f48ecbe74b3872fa303bf58f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bb1602908c67db7197ab001638573262bccc6ca2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: loongson: Fix error handling in ACPI property parsing\n\nIn loongson_card_parse_acpi(), the return value of\ndevice_property_read_string() for the `codec-dai-name` property was\nignored. If the property is missing or invalid, an uninitialized pointer\nwould be used later, potentially leading to undefined behavior.\n\nFix this by checking the return value and propagating the error\nappropriately."
    }
  ],
  "lastModified": "2026-09-16T15:18:19.700",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}