{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b9a66cd5ccbb9fade15d0e427e19470d8ad35b75"
            },
            {
              "fixed": "02226839079ccc558820a3b25c4c46812927b4ba"
            },
            {
              "fixed": "16cbec24897624051b324aa3a85859c38ca65fde"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43096.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmshv: Fix infinite fault loop on permission-denied GPA intercepts\n\nPrevent infinite fault loops when guests access memory regions without\nproper permissions. Currently, mshv_handle_gpa_intercept() attempts to\nremap pages for all faults on movable memory regions, regardless of\nwhether the access type is permitted. When a guest writes to a read-only\nregion, the remap succeeds but the region remains read-only, causing\nimmediate re-fault and spinning the vCPU indefinitely.\n\nValidate intercept access type against region permissions before\nattempting remaps. Reject writes to non-writable regions and executes to\nnon-executable regions early, returning false to let the VMM handle the\nintercept appropriately.\n\nThis also closes a potential DoS vector where malicious guests could\nintentionally trigger these fault loops to consume host resources.",
  "id": "CVE-2026-43096",
  "modified": "2026-07-08T05:38:42.177524118Z",
  "published": "2026-05-06T07:40:27.453Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02226839079ccc558820a3b25c4c46812927b4ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16cbec24897624051b324aa3a85859c38ca65fde"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43096.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43096"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "mshv: Fix infinite fault loop on permission-denied GPA intercepts"
}