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CVE-2026-80635

Estado: RecibidaAlta (8.8)—

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

wifi: wcn36xx: fix OOB read from short trigger BA firmware response

The firmware response length is only checked against sizeof(*rsp) (20 bytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read at buf + 20 without verifying the response contains it. This causes an out-of-bounds read of stale heap data, corrupting the BA session state.

Add validation that the response includes the candidate data.

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.

Acceso red adyacente (AV:A) sin privilegios ni interacción en driver WiFi del kernel. OOB read causa corrupción de datos de sesión BA (T1005) y potencial DoS de comunicaciones inalámbricas (T1499.004).

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

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationFilter Network TrafficDisable or Remove Feature or Program

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-2026-80635",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/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": 2.8
      }
    ]
  },
  "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": "16be1ac55944412e8d132b1db26f994b368c5742",
              "lessThan": "04aba50212f9f274e1a726fb3873b5ce8da2d821",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "16be1ac55944412e8d132b1db26f994b368c5742",
              "lessThan": "c07aa0534d50361183833e3803204044cf1d0476",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "16be1ac55944412e8d132b1db26f994b368c5742",
              "lessThan": "d0b57bcd0dac6e2c9a3e474ec280e7db0b3edf35",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "16be1ac55944412e8d132b1db26f994b368c5742",
              "lessThan": "af8f0ea1f0a3a5fb5ed2b8fed3f1501d644597ee",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "16be1ac55944412e8d132b1db26f994b368c5742",
              "lessThan": "d0cafe6ed8d1f6d0097eda31d85f5760d4f359c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "16be1ac55944412e8d132b1db26f994b368c5742",
              "lessThan": "b5e6f21923ca89d90256e7346301056f6502691e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/ath/wcn36xx/smd.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/ath/wcn36xx/smd.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-28T08:16:48.400",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/04aba50212f9f274e1a726fb3873b5ce8da2d821",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af8f0ea1f0a3a5fb5ed2b8fed3f1501d644597ee",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b5e6f21923ca89d90256e7346301056f6502691e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c07aa0534d50361183833e3803204044cf1d0476",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d0b57bcd0dac6e2c9a3e474ec280e7db0b3edf35",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d0cafe6ed8d1f6d0097eda31d85f5760d4f359c2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wcn36xx: fix OOB read from short trigger BA firmware response\n\nThe firmware response length is only checked against sizeof(*rsp) (20\nbytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read\nat buf + 20 without verifying the response contains it. This causes an\nout-of-bounds read of stale heap data, corrupting the BA session state.\n\nAdd validation that the response includes the candidate data."
    }
  ],
  "lastModified": "2026-08-29T07:16:47.537",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}