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CVE-2026-72013

Estado: RecibidaSin puntuar—

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

riscv: Prevent NULL pointer dereference in machine_kexec_prepare()

A NULL pointer dereference issue is noticed in riscv's machine_kexec_prepare(), where image->segment[i].buf might be NULL and copied unchecked.

The NULL buf comes from ima_add_kexec_buffer(), where kbuf is added by kexec_add_buffer(), but kbuf.buffer is NULL, then it is copied without a check in machine_kexec_prepare():

Address this by adding a check before the data copy attempt.

Detalles técnicos trazas, registros y código del informe original
  kexec_file_load
    -> kimage_file_alloc_init()
       -> kimage_file_prepare_segments()
          -> ima_add_kexec_buffer()
             -> kexec_add_buffer()
    -> machine_kexec_prepare()
       -> memcpy()

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

⚠ 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-2026-72013",
  "cveTags": [],
  "metrics": {},
  "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": "4211742f0f9e083188f4f0ada00d6eeeef31b7c7",
              "lessThan": "606cc45e871e34b80a2f63874f069387a5b44176",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7fb4d78a6ade6026d9e5cf438c2a46ab962e032",
              "lessThan": "c462e15497dc40abe369b3be7a2c91ac5d1be6f9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7fb4d78a6ade6026d9e5cf438c2a46ab962e032",
              "lessThan": "b5f92cc4e24a298bf390b0b189a4b888c0900161",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7fb4d78a6ade6026d9e5cf438c2a46ab962e032",
              "lessThan": "6ad6954492697681ebcfc1beb0eb384406cd4b65",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7fb4d78a6ade6026d9e5cf438c2a46ab962e032",
              "lessThan": "eadd0c2c76aee6a738f17f251434c77db3c606c8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7fb4d78a6ade6026d9e5cf438c2a46ab962e032",
              "lessThan": "d5b2752a17efc165793ae38f2c24b5ed9c04ffde",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b7fb4d78a6ade6026d9e5cf438c2a46ab962e032",
              "lessThan": "81bbcff0c053c4f5c711c31a9b72fc492bd96c3f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3ca8a07f141fd8eec347a82bdfa4b94164f2bb97",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3ba83e46b591381e718007f55c9f831fd0cd7ee8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.47",
              "lessThan": "5.15.212",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.17.15",
              "lessThan": "5.18",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.18.4",
              "lessThan": "5.19",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "arch/riscv/kernel/machine_kexec.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": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/riscv/kernel/machine_kexec.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:00.033",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: Prevent NULL pointer dereference in machine_kexec_prepare()\n\nA NULL pointer dereference issue is noticed in riscv's\nmachine_kexec_prepare(), where image->segment[i].buf might be NULL and\ncopied unchecked.\n\nThe NULL buf comes from ima_add_kexec_buffer(), where kbuf is added by\nkexec_add_buffer(), but kbuf.buffer is NULL, then it is copied without\na check in machine_kexec_prepare():\n\n  kexec_file_load\n    -> kimage_file_alloc_init()\n       -> kimage_file_prepare_segments()\n          -> ima_add_kexec_buffer()\n             -> kexec_add_buffer()\n    -> machine_kexec_prepare()\n       -> memcpy()\n\nAddress this by adding a check before the data copy attempt."
    }
  ],
  "lastModified": "2026-08-17T06:17:58.763",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}