{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4a03b2ac06a5bcae29371866d9d11f5bfd4c9188"
            },
            {
              "fixed": "a94d6726ec8680a2b0c453fc782a543f68a1ea06"
            },
            {
              "fixed": "7a54e0cbaad4a5a09e7cc7a4f05d181048e98ca7"
            },
            {
              "fixed": "485ed44db5694d8d2e5027f63ad608e705286f30"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.1.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68435.json"
  },
  "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.",
  "id": "CVE-2026-68435",
  "modified": "2026-08-13T03:52:01.493015584Z",
  "published": "2026-08-12T00:07:23.359Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/485ed44db5694d8d2e5027f63ad608e705286f30"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a54e0cbaad4a5a09e7cc7a4f05d181048e98ca7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a94d6726ec8680a2b0c453fc782a543f68a1ea06"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68435.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68435"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "LoongArch: Fix address space mismatch in kexec command line lookup"
}