{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-45994",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-45994"
  ],
  "published": "2026-05-27T12:59:23Z",
  "summary": "ibmasm: fix OOB reads in command_file_write due to missing size checks",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nibmasm: fix OOB reads in command_file_write due to missing size checks\n\nThe command_file_write() handler allocates a kernel buffer of exactly\ncount bytes and copies user data into it, but does not validate the\nbuffer against the dot command protocol before passing it to\nget_dot_command_size() and get_dot_command_timeout().\n\nSince both the allocation size (count) and the header fields (command_size,\ndata_size) are independently user-controlled, an attacker can cause\nget_dot_command_size() to return a value exceeding the allocation,\ntriggering OOB reads in get_dot_command_timeout() and an out-of-bounds\nmemcpy_toio() that leaks kernel heap memory to the service processor.\n\nFix with two guards: reject writes smaller than sizeof(struct\ndot_command_header) before allocation, then after copying user data\nreject commands where the buffer is smaller than the total size declared\nby the header (sizeof(header) + command_size + data_size). This ensures\nall subsequent header and payload field accesses stay within the buffer.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.175",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45994"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/44ee19422aa82a6847594866de7e5a31e4ef98b3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7b8a574da5d7ea99b943f7a3458a17a1d95e8838"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d50e2019c9d7c433f56d9dff65703eb904aa1fb1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a672682d39dd34e2b5ba4feb436723bed65125ff"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/aefc1a97da17d8309974690c8a03e439a91ebb1c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ee5737891464030a189837467df3b81a273718ad"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d0fb4d1dc43f8d5179917a2daaa82680993d4cdf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0eb09f737428e482a32a2e31e5e223f2b35a71d3"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-15T02:03:26Z"
  }
}