{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "76b6f5dfb3fda76fce1f9990d6fa58adc711122b"
            },
            {
              "fixed": "0abd81645fc95ec6a9d4e4813000f22c5efc0ff4"
            },
            {
              "fixed": "8d76afe84fa2babf604b3c173730d4d2b067e361"
            }
          ],
          "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": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43390.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnstree: tighten permission checks for listing\n\nEven privileged services should not necessarily be able to see other\nprivileged service's namespaces so they can't leak information to each\nother. Use may_see_all_namespaces() helper that centralizes this policy\nuntil the nstree adapts.",
  "id": "CVE-2026-43390",
  "modified": "2026-08-12T03:51:22.206418256Z",
  "published": "2026-05-08T14:21:35.337Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0abd81645fc95ec6a9d4e4813000f22c5efc0ff4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d76afe84fa2babf604b3c173730d4d2b067e361"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43390.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43390"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nstree: tighten permission checks for listing"
}