CVE-2026-72013 (GCVE-0-2026-72013)
Vulnerability from cvelistv5
Published
2026-08-15 05:51
Modified
2026-08-17 05:06
Severity ?
Summary
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(): kexec_file_load -> kimage_file_alloc_init() -> kimage_file_prepare_segments() -> ima_add_kexec_buffer() -> kexec_add_buffer() -> machine_kexec_prepare() -> memcpy() Address this by adding a check before the data copy attempt.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4211742f0f9e083188f4f0ada00d6eeeef31b7c7
Version: b7fb4d78a6ade6026d9e5cf438c2a46ab962e032
Version: b7fb4d78a6ade6026d9e5cf438c2a46ab962e032
Version: b7fb4d78a6ade6026d9e5cf438c2a46ab962e032
Version: b7fb4d78a6ade6026d9e5cf438c2a46ab962e032
Version: b7fb4d78a6ade6026d9e5cf438c2a46ab962e032
Version: b7fb4d78a6ade6026d9e5cf438c2a46ab962e032
Version: 3ca8a07f141fd8eec347a82bdfa4b94164f2bb97
Version: 3ba83e46b591381e718007f55c9f831fd0cd7ee8
Version: 5.15.47   ≤
Version: 5.17.15   ≤
Version: 5.18.4   ≤
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{
  "containers": {
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      "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\u0027s\nmachine_kexec_prepare(), where image-\u003esegment[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    -\u003e kimage_file_alloc_init()\n       -\u003e kimage_file_prepare_segments()\n          -\u003e ima_add_kexec_buffer()\n             -\u003e kexec_add_buffer()\n    -\u003e machine_kexec_prepare()\n       -\u003e memcpy()\n\nAddress this by adding a check before the data copy attempt."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:06:35.378Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176"
        },
        {
          "url": "https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65"
        },
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          "url": "https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde"
        },
        {
          "url": "https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f"
        }
      ],
      "title": "riscv: Prevent NULL pointer dereference in machine_kexec_prepare()",
      "x_generator": {
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72013",
    "datePublished": "2026-08-15T05:51:41.982Z",
    "dateReserved": "2026-08-09T03:40:39.899Z",
    "dateUpdated": "2026-08-17T05:06:35.378Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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