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CVE-2026-89597

Estado: RecibidaAlta (7.8)—

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

fbdev: uvesafb: unregister connector callback on init failure

uvesafb_init() registers the v86d connector callback before registering the platform driver. If platform_driver_register() fails, the function returns the error directly and leaves the connector callback registered.

The later platform-device failure path already unregisters the callback. Add the same cleanup before the final return when platform-driver registration fails.

This issue was identified during our ongoing static-analysis research while reviewing kernel code.

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 de escalada de privilegios en kernel Linux (AV:L, PR:L) por fallo en limpieza de callbacks; permite ejecución de código con privilegios elevados o negación de servicio.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationFilter Network Traffic

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-2026-89597",
  "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": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "b149f77d04082a9da75944cdc488becb0e35258f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "17518e7123f7ef01b1155064dc01f2087583908e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "9eb7b3cbe99c9c0edbff69eb155c723e30983c22",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "9f8a822b44c42502f105cf6574f4867067eecdd0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "466a8af0dee2cf745307155e26884e19a37b7e15",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "9e768ae51426af2034d479133cfd73010d641b1a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51",
              "lessThan": "de8db23aa7c337e606fca9faf48b3ba72968597a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/video/fbdev/uvesafb.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.24"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.24",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/video/fbdev/uvesafb.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:44.463",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/17518e7123f7ef01b1155064dc01f2087583908e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9eb7b3cbe99c9c0edbff69eb155c723e30983c22",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b149f77d04082a9da75944cdc488becb0e35258f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: uvesafb: unregister connector callback on init failure\n\nuvesafb_init() registers the v86d connector callback before registering\nthe platform driver. If platform_driver_register() fails, the function\nreturns the error directly and leaves the connector callback registered.\n\nThe later platform-device failure path already unregisters the callback.\nAdd the same cleanup before the final return when platform-driver\nregistration fails.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."
    }
  ],
  "lastModified": "2026-09-14T13:19:13.827",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}