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CVE-2026-93796

Estado: RecibidaAlta (7)—

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

wifi: iwlwifi: pcie: null RX pointers after free

When iwl_pcie_tx_init() fails after RX init, nic init unwinds via iwl_pcie_rx_free().

The freed RX members stayed non-NULL on the live transport object, so later teardown or retry could touch stale RX state. Set rx_pool, global_table, rxq, and alloc_page to NULL after free to make repeated cleanup and retry paths safe.

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 (AV:L/PR:L) en kernel Linux con privilegios locales requeridos. Null pointer dereference en liberación de memoria permite DoS o lectura de datos sensibles del kernel mediante acceso a estado inválido tras double-free en iwlwifi.

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-2026-93796",
  "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": "9cf671d60fdbeb8f875859c11148cf13c326ada2",
              "lessThan": "6ec5bf430cf7466cb412e47f2761594092781fac",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2",
              "lessThan": "3456c5bcc987aeb182e50e30c9b02be8420e9953",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2",
              "lessThan": "2c79d7a7b583050c9f58041465cb46fe3483ab5d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-24T17:17:12.383",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2c79d7a7b583050c9f58041465cb46fe3483ab5d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3456c5bcc987aeb182e50e30c9b02be8420e9953",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6ec5bf430cf7466cb412e47f2761594092781fac",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: null RX pointers after free\n\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\n\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe."
    }
  ],
  "lastModified": "2026-09-25T13:17:20.210",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}