{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"
            },
            {
              "fixed": "e1b21e6066615e7d3d3a7aa2677e415e563fd7cc"
            },
            {
              "fixed": "b720c84087cb547f23ce03eab93568c1769e4556"
            },
            {
              "fixed": "54b48ae83de8bb06e65079d96368efe359d4909c"
            },
            {
              "fixed": "8f5b1a7cb009a93c48e9e334a2f59a660f9afc07"
            },
            {
              "fixed": "190e5f808e8058640b408ccfed25440b441a718a"
            },
            {
              "fixed": "1e689a56173827669a35da7cb2a3c78ed5c53680"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "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-2026-43378.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix use-after-free in smb2_open()\n\nThe opinfo pointer obtained via rcu_dereference(fp-\u003ef_opinfo) is\ndereferenced after rcu_read_unlock(), creating a use-after-free\nwindow.",
  "id": "CVE-2026-43378",
  "modified": "2026-07-08T05:38:11.019813239Z",
  "published": "2026-05-08T14:21:27.319Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43378.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43378"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "smb: server: fix use-after-free in smb2_open()"
}