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CVE-2023-53769

Estado: AplazadaCrítica (9.3)—

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

virt/coco/sev-guest: Double-buffer messages

The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.

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.

AV:L sin UI confirma escalada local (T1068). Acceso a memoria compartida sin cifrado permite lectura de datos confidenciales (T1005) e interferencia en integridad de mensajes (T1565.001).

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 ProgramRestrict File and Directory PermissionsRemote Data StorageExecution PreventionEncrypt Sensitive InformationApplication 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-2023-53769",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.3,
          "attackVector": "LOCAL",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "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": "d5af44dde5461d125d1602ac913ab5c6bdf09b8b",
              "lessThan": "577a64725bfd77645986168e953d405067ee565b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d5af44dde5461d125d1602ac913ab5c6bdf09b8b",
              "lessThan": "c27dafc4aa50a29ec927b3aa84ac7b430071f682",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d5af44dde5461d125d1602ac913ab5c6bdf09b8b",
              "lessThan": "4b69c63f716cfda38e1210e65b68f67f6cee2ddf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d5af44dde5461d125d1602ac913ab5c6bdf09b8b",
              "lessThan": "965006103a14703cc42043bbf9b5e0cdf7a468ad",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/virt/coco/sev-guest/sev-guest.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": "6.1.28",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2.15",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/virt/coco/sev-guest/sev-guest.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-08T02:15:52.920",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4b69c63f716cfda38e1210e65b68f67f6cee2ddf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/577a64725bfd77645986168e953d405067ee565b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/965006103a14703cc42043bbf9b5e0cdf7a468ad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c27dafc4aa50a29ec927b3aa84ac7b430071f682",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirt/coco/sev-guest: Double-buffer messages\n\nThe encryption algorithms read and write directly to shared unencrypted\nmemory, which may leak information as well as permit the host to tamper\nwith the message integrity. Instead, copy whole messages in or out as\nneeded before doing any computation on them."
    }
  ],
  "lastModified": "2026-08-04T10:19:20.820",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}