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CVE-2026-72234

Estado: RecibidaCrítica (9.8)—

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

batman-adv: access unicast_ttvn skb->data 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.

This was done correctly for the ethernet header but missed for the unicast_packet pointer.

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 uso-después-liberación (use-after-free) en el kernel Linux accesible remotamente sin privilegios (AV:N/PR:N). Permite negación de servicio por corrupción de memoria o potencial ejecución de código. La explotación requiere enviar paquetes batman-adv especialmente construidos.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

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)

Mostrar
{
  "id": "CVE-2026-72234",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/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": 3.9
      }
    ]
  },
  "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": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "aa9558af859934f24717d4bab97d61004f91a736",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "9c2c05629e46c1fd43931506d41c56a885a98eb4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "7b162b36de750565404cd3b98315706622c6974f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "ed90eb5c68420cdfe67ec1f773324198d2ef6f50",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "979175834a699ccc3c4c0b0ba60ecae0f135a587",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "b8afcf799b2cc92c41beebd029e53ed18960184a",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "9a7b7248798123efbd5fafe58461d57c7cc718af",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
              "lessThan": "7141990add3f75436f2933cb310654cad3b1e3e9",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/batman-adv/routing.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.13",
              "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/routing.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:50.390",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50",
      "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: access unicast_ttvn skb->data 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.\n\nThis was done correctly for the ethernet header but missed for the\nunicast_packet pointer."
    }
  ],
  "lastModified": "2026-08-17T06:18:24.847",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}