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CVE-2023-54306

Estado: AplazadaAlta (7.5)—

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

net: tls: avoid hanging tasks on the tx_lock

syzbot sent a hung task report and Eric explains that adversarial receiver may keep RWIN at 0 for a long time, so we are not guaranteed to make forward progress. Thread which took tx_lock and went to sleep may not release tx_lock for hours. Use interruptible sleep where possible and reschedule the work if it can't take the lock.

Testing: existing selftest passes

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 red sin privilegios (AV:N, PR:N) que permite denegación de servicio por bloqueo indefinido de hilos (hung task) mediante manipulación del RWIN del receptor en TLS.

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-2023-54306",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "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": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
              "lessThan": "bde541a57b4204d0a800afbbd3d1c06c9cdb133f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
              "lessThan": "7123a4337bf73132bbfb5437e4dc83ba864a9a1e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
              "lessThan": "be5d5d0637fd88c18ee76024bdb22649a1de00d6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
              "lessThan": "1f800f6aae57d2d8f63d32fff383017cbc11cf65",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
              "lessThan": "ccf1ccdc5926907befbe880b562b2a4b5f44c087",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
              "lessThan": "f3221361dc85d4de22586ce8441ec2c67b454f5d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c8d6817345f4ba228d07380e571676405e112872",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.3.11",
              "lessThan": "5.4",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/tls/tls_sw.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.4.235",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.173",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.100",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.18",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/tls/tls_sw.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-30T13:16:19.760",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1f800f6aae57d2d8f63d32fff383017cbc11cf65",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7123a4337bf73132bbfb5437e4dc83ba864a9a1e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bde541a57b4204d0a800afbbd3d1c06c9cdb133f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/be5d5d0637fd88c18ee76024bdb22649a1de00d6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ccf1ccdc5926907befbe880b562b2a4b5f44c087",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f3221361dc85d4de22586ce8441ec2c67b454f5d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: avoid hanging tasks on the tx_lock\n\nsyzbot sent a hung task report and Eric explains that adversarial\nreceiver may keep RWIN at 0 for a long time, so we are not guaranteed\nto make forward progress. Thread which took tx_lock and went to sleep\nmay not release tx_lock for hours. Use interruptible sleep where\npossible and reschedule the work if it can't take the lock.\n\nTesting: existing selftest passes"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: tls: evitar que las tareas se queden colgadas en el tx_lock\n\nsyzbot envió un informe de tarea colgada y Eric explica que un receptor malintencionado puede mantener RWIN en 0 durante mucho tiempo, por lo que no se garantiza que avancemos. El hilo que tomó el tx_lock y se suspendió puede no liberar el tx_lock durante horas. Usar el modo de suspensión interrumpible donde sea posible y reprogramar el trabajo si no puede adquirir el bloqueo.\n\nPruebas: el auto-test existente se supera"
    }
  ],
  "lastModified": "2026-08-04T11:16:39.737",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}