CVE-2023-52980

Estado: AnalizadaAlta (7.8)—

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

block: ublk: extending queue_size to fix overflow

When validating drafted SPDK ublk target, in a case that assigning large queue depth to multiqueue ublk device, ublk target would run into a weird incorrect state. During rounds of review and debug, An overflow bug was found in ublk driver.

In ublk_cmd.h, UBLK_MAX_QUEUE_DEPTH is 4096 which means each ublk queue depth can be set as large as 4096.

Leer descripción completaMostrar menos

But when setting qd for a ublk device, sizeof(struct ublk_queue) + depth * sizeof(struct ublk_io) will be larger than 65535 if qd is larger than 2728. Then queue_size is overflowed, and ublk_get_queue() references a wrong pointer position. The wrong content of ublk_queue elements will lead to out-of-bounds memory access.

Extend queue_size in ublk_device as "unsigned int".

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: 0.24%
Percentil entre todas las CVEs puntuadas: 14
Fecha de la puntuación: 6/10/2026

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 escalation90 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %
Impacto secundarioT1005 Data from Local Systemcollection70 %

AV:L/PR:L sin UI permite escalada local. El desbordamiento de buffer (CWE-787) en estructura del kernel ublk permite ejecución de código y lectura de memoria con acceso local privilegiado.

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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-787

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-52980",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "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": "71f28f3136aff5890cd56de78abc673f8393cad9",
              "lessThan": "ee1e3fe4b4579f856997190a00ea4db0307b4332",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "71f28f3136aff5890cd56de78abc673f8393cad9",
              "lessThan": "29baef789c838bd5c02f50c88adbbc6b955aaf61",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/block/ublk_drv.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.11",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/block/ublk_drv.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-03-27T17:15:45.183",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/29baef789c838bd5c02f50c88adbbc6b955aaf61",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee1e3fe4b4579f856997190a00ea4db0307b4332",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: ublk: extending queue_size to fix overflow\n\nWhen validating drafted SPDK ublk target, in a case that\nassigning large queue depth to multiqueue ublk device,\nublk target would run into a weird incorrect state. During\nrounds of review and debug, An overflow bug was found\nin ublk driver.\n\nIn ublk_cmd.h, UBLK_MAX_QUEUE_DEPTH is 4096 which means\neach ublk queue depth can be set as large as 4096. But\nwhen setting qd for a ublk device,\nsizeof(struct ublk_queue) + depth * sizeof(struct ublk_io)\nwill be larger than 65535 if qd is larger than 2728.\nThen queue_size is overflowed, and ublk_get_queue()\nreferences a wrong pointer position. The wrong content of\nublk_queue elements will lead to out-of-bounds memory\naccess.\n\nExtend queue_size in ublk_device as \"unsigned int\"."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bloque: ublk: extensión de queue_size para corregir el desbordamiento Al validar el borrador del objetivo ublk de SPDK, en un caso en el que se asigna una gran profundidad de cola al dispositivo ublk de múltiples colas, el objetivo ublk se ejecutaría en un estado incorrecto extraño. Durante las rondas de revisión y depuración, se encontró un error de desbordamiento en el controlador ublk. En ublk_cmd.h, UBLK_MAX_QUEUE_DEPTH es 4096, lo que significa que cada profundidad de cola ublk se puede configurar tan grande como 4096. Pero al configurar qd para un dispositivo ublk, sizeof(struct ublk_queue) + profundidad * sizeof(struct ublk_io) será mayor que 65535 si qd es mayor que 2728. Entonces queue_size se desborda y ublk_get_queue() hace referencia a una posición de puntero incorrecta. El contenido incorrecto de los elementos ublk_queue provocará un acceso a memoria fuera de los límites. Extienda queue_size en ublk_device como \"unsigned int\"."
    }
  ],
  "lastModified": "2026-06-17T06:44:02.847",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "45B4BA06-A459-4473-8903-3AE63DA4B625",
              "versionEndExcluding": "6.1.11",
              "versionStartIncluding": "6.0"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2BDA597B-CAC1-4DF0-86F0-42E142C654E9"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "725C78C9-12CE-406F-ABE8-0813A01D66E8"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A127C155-689C-4F67-B146-44A57F4BFD85"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D34127CC-68F5-4703-A5F6-5006F803E4AE"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4AB8D555-648E-4F2F-98BD-3E7F45BD12A8"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}