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CVE-2026-71973

Estado: Pendiente de análisisMedia (5.2)—

U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.

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.

Imagen SquashFS malformada en medio extraíble (T1091). Integer overflow causa corrupción de heap (T1565.001) y crash del bootloader (T1499.004 - negación de servicio de recursos).

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

Restrict File and Directory PermissionsRemote Data StorageLimit Hardware InstallationFilter Network TrafficBehavior Prevention on EndpointEncrypt Sensitive Information

Tecnologías afectadas (1)

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

Denx — U-bootAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-71973",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-71973",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-10-02T12:29:06.594431Z"
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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          "privilegesRequired": "NONE",
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      }
    ],
    "cvssMetricV40": [
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          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "PHYSICAL",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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          "vendor": "u-boot",
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          "versions": [
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              "status": "affected",
              "version": "0",
              "lessThan": "2026.10-rc4",
              "versionType": "custom"
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          "packageURL": "pkg:github/u-boot/u-boot",
          "defaultStatus": "unaffected"
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  "published": "2026-09-29T22:18:22.080",
  "references": [
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      "url": "https://github.com/u-boot/u-boot",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://github.com/u-boot/u-boot/blob/v2026.07/fs/squashfs/sqfs.c#L814",
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      "url": "https://github.com/u-boot/u-boot/commit/561ae28cb56a082cfa90c1c421c4955bc215470b",
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      "source": "disclosure@vulncheck.com"
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          "value": "CWE-190"
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    {
      "lang": "en",
      "value": "U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader."
    }
  ],
  "lastModified": "2026-10-02T13:17:53.737",
  "sourceIdentifier": "disclosure@vulncheck.com"
}