{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68435",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-68435"
  ],
  "published": "2026-08-12T00:06:30Z",
  "summary": "LoongArch: Fix address space mismatch in kexec command line lookup",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Fix address space mismatch in kexec command line lookup\n\nWhen searching the loaded segments for the \"kexec\" command line marker,\nthe kexec_load(2) path (file_mode == 0) passes the user-space segment\nbuffer straight to strncmp() through a bogus (char __user *) cast. This\ndereferences a user pointer in kernel context, which is wrong and is\nflagged by sparse:\n\n  arch/loongarch/kernel/machine_kexec.c:84:51: sparse: incorrect type in\n  argument 2 (different address spaces) @@ expected char const * @@ got\n  char [noderef] __user *\n\nHere copy the marker-sized prefix of each segment into a small on-stack\nbuffer with copy_from_user() before comparing, and skip segments that\nfault. The subsequent copy_from_user() that stages the full command line\ninto the safe area is left unchanged.",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-68435"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a94d6726ec8680a2b0c453fc782a543f68a1ea06"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7a54e0cbaad4a5a09e7cc7a4f05d181048e98ca7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/485ed44db5694d8d2e5027f63ad608e705286f30"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}