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CVE-2026-90353

Estado: RecibidaAlta (7)—

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

wifi: mt76: mt7915: fix ext PHY use-after-free on register error path

After mt7915_register_ext_phy() succeeded, a failure of the main PHY mt7915_init_debugfs() or mt7915_coredump_register() unwound through free_phy2, which called ieee80211_free_hw() on the ext PHY hw while it was still registered with mac80211, since mt76_unregister_device() only unregisters the main hw. Unregister the ext PHY (thermal + phy + hw) first and skip the redundant free.

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 use-after-free en kernel Linux con privilegios locales (PR:L, AV:L) que permite escalada. El error de liberación de memoria en ruta de error puede provocar DoS (availability impact: 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-2026-90353",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "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": "7b8e1ae886e45aed9274048f2836a70b75ecfa40",
              "lessThan": "aa55bec92ba7747dd08feff409f8074c5e052e71",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7b8e1ae886e45aed9274048f2836a70b75ecfa40",
              "lessThan": "ad706fcf6255494613b94418e7243d98065dbeaf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7b8e1ae886e45aed9274048f2836a70b75ecfa40",
              "lessThan": "34058ad122f7524e33df8e38caba4b1d803b025a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7b8e1ae886e45aed9274048f2836a70b75ecfa40",
              "lessThan": "a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7b8e1ae886e45aed9274048f2836a70b75ecfa40",
              "lessThan": "648f5f03ff50d4bd719106ace0cdf1d8be02cbdd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7b8e1ae886e45aed9274048f2836a70b75ecfa40",
              "lessThan": "15b960014f24dce5388d4a2e7274e6490cb3c421",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7915/init.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.19",
              "versionType": "semver"
            },
            {
              "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": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7915/init.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:34.140",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/15b960014f24dce5388d4a2e7274e6490cb3c421",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/34058ad122f7524e33df8e38caba4b1d803b025a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/648f5f03ff50d4bd719106ace0cdf1d8be02cbdd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa55bec92ba7747dd08feff409f8074c5e052e71",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ad706fcf6255494613b94418e7243d98065dbeaf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7915: fix ext PHY use-after-free on register error path\n\nAfter mt7915_register_ext_phy() succeeded, a failure of the main PHY\nmt7915_init_debugfs() or mt7915_coredump_register() unwound through\nfree_phy2, which called ieee80211_free_hw() on the ext PHY hw while it\nwas still registered with mac80211, since mt76_unregister_device() only\nunregisters the main hw. Unregister the ext PHY (thermal + phy + hw)\nfirst and skip the redundant free."
    }
  ],
  "lastModified": "2026-09-18T18:17:55.010",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}