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CVE-2026-80601

Estado: RecibidaAlta (8.8)—

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

batman-adv: gw: acquire ethernet header only after skb realloc

The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-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 accesible localmente (AV:A). Explotación requiere acceso a red adyacente. Impacto: escalada de privilegios (modificación de memoria) y potencial denegación de servicio por corrupción de heap.

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 ProgramApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability ScanningPrivileged Account Management

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-2026-80601",
  "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": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "2760b38222c8828b075802342fe3b91eb823d542",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "6c37f1166549c999ccd164b0cb6462d1ae68f8f6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "b79884a5567bf788fb76c30832467cf6a56f3c0d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "afac8096bde4948e3caa7e4dd733867cfbd3018e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "e3f4325e35dd6e76b80665f3510738ce34819753",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "e6b43acd34b219b807e65096ce207b087942779d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "916dac5f2944f63f07f7b501acbea6737dbbed0e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9",
              "lessThan": "77880a3be88d378d60cc1e8f8ec70430e2ed0518",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/batman-adv/gateway_client.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "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": [
            "net/batman-adv/gateway_client.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-28T08:16:43.947",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2760b38222c8828b075802342fe3b91eb823d542",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6c37f1166549c999ccd164b0cb6462d1ae68f8f6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/77880a3be88d378d60cc1e8f8ec70430e2ed0518",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/916dac5f2944f63f07f7b501acbea6737dbbed0e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/afac8096bde4948e3caa7e4dd733867cfbd3018e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b79884a5567bf788fb76c30832467cf6a56f3c0d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e3f4325e35dd6e76b80665f3510738ce34819753",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e6b43acd34b219b807e65096ce207b087942779d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: gw: acquire ethernet header only after skb realloc\n\nThe pskb_may_pull() called by batadv_get_vid() could reallocate the buffer\nbehind the skb. Variables which were pointing to the old buffer need to be\nreassigned to avoid an use-after-free."
    }
  ],
  "lastModified": "2026-08-29T07:16:45.190",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}