CVE-2023-54046

Estado: AplazadaAlta (7.8)—

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

crypto: essiv - Handle EBUSY correctly

As it is essiv only handles the special return value of EINPROGERSS, which means that in all other cases it will free data related to the request.

However, as the caller of essiv may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.20%
Percentil entre todas las CVEs puntuadas: 8
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1499.004 Application or System Exploitationimpact75 %
Impacto secundarioT1565.001 Stored Data Manipulationimpact65 %

Vulnerabilidad en kernel Linux con AV:L y PR:L permite escalada de privilegios; use-after-free en essiv causa DoS o corrupción de datos en operaciones criptográficas.

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 Program Restrict File and Directory Permissions Remote Data Storage Filter Network Traffic Execution Prevention Encrypt Sensitive Information

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-54046",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "be1eb7f78aa8fbe34779c56c266ccd0364604e71",
              "lessThan": "c61e7d182ee3f3f5ecf18a2964e303d49c539b52",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "be1eb7f78aa8fbe34779c56c266ccd0364604e71",
              "lessThan": "796e02cca30a67322161f0745e5ce994bbe75605",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "be1eb7f78aa8fbe34779c56c266ccd0364604e71",
              "lessThan": "840a1d3b77c1b062bd62b4733969a5b1efc274ce",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "be1eb7f78aa8fbe34779c56c266ccd0364604e71",
              "lessThan": "a006aa3eedb8bfd6fe317c3cfe9c86ffe76b2385",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "be1eb7f78aa8fbe34779c56c266ccd0364604e71",
              "lessThan": "69c67d451fc19d88e54f7d97e8e7c093e08357e1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "be1eb7f78aa8fbe34779c56c266ccd0364604e71",
              "lessThan": "b5a772adf45a32c68bef28e60621f12617161556",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "crypto/essiv.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": "5.15.99",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "crypto/essiv.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T13:16:06.253",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/69c67d451fc19d88e54f7d97e8e7c093e08357e1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/796e02cca30a67322161f0745e5ce994bbe75605",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/840a1d3b77c1b062bd62b4733969a5b1efc274ce",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a006aa3eedb8bfd6fe317c3cfe9c86ffe76b2385",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b5a772adf45a32c68bef28e60621f12617161556",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c61e7d182ee3f3f5ecf18a2964e303d49c539b52",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: essiv - Handle EBUSY correctly\n\nAs it is essiv only handles the special return value of EINPROGERSS,\nwhich means that in all other cases it will free data related to the\nrequest.\n\nHowever, as the caller of essiv may specify MAY_BACKLOG, we also need\nto expect EBUSY and treat it in the same way.  Otherwise backlogged\nrequests will trigger a use-after-free."
    }
  ],
  "lastModified": "2026-08-04T10:19:26.320",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}