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CVE-2026-23285

Estado: AnalizadaMedia (5.5)—

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

drbd: fix null-pointer dereference on local read error

In drbd_request_endio(), READ_COMPLETED_WITH_ERROR is passed to __req_mod() with a NULL peer_device:

The READ_COMPLETED_WITH_ERROR handler then unconditionally passes this NULL peer_device to drbd_set_out_of_sync(), which dereferences it, causing a null-pointer dereference.

Fix this by obtaining the peer_device via first_peer_device(device), matching how drbd_req_destroy() handles the same situation.

Detalles técnicos trazas, registros y código del informe original
  __req_mod(req, what, NULL, &m);

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-23285",
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          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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  "published": "2026-03-25T11:16:23.247",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrbd: fix null-pointer dereference on local read error\n\nIn drbd_request_endio(), READ_COMPLETED_WITH_ERROR is passed to\n__req_mod() with a NULL peer_device:\n\n  __req_mod(req, what, NULL, &m);\n\nThe READ_COMPLETED_WITH_ERROR handler then unconditionally passes this\nNULL peer_device to drbd_set_out_of_sync(), which dereferences it,\ncausing a null-pointer dereference.\n\nFix this by obtaining the peer_device via first_peer_device(device),\nmatching how drbd_req_destroy() handles the same situation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrbd: corrección de desreferencia de puntero nulo en error de lectura local\n\nEn drbd_request_endio(), READ_COMPLETED_WITH_ERROR se pasa a __req_mod() con un peer_device NULO:\n\n__req_mod(req, what, NULL, &m);\n\nEl gestor de READ_COMPLETED_WITH_ERROR luego pasa incondicionalmente este peer_device NULO a drbd_set_out_of_sync(), que lo desreferencia, causando una desreferencia de puntero nulo.\n\nEsto se corrige obteniendo el peer_device a través de first_peer_device(device), coincidiendo con cómo drbd_req_destroy() maneja la misma situación."
    }
  ],
  "lastModified": "2026-06-17T10:21:15.373",
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