{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9157d99f17384f362c65b02cec065e0aec5f0b56"
            },
            {
              "fixed": "033844748010a3b8265bf1c90b9ae8ffe4cd9ca7"
            }
          ],
          "repo": "https://github.com/libfuse/libfuse",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x669-v3mq-r358"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33179.json"
  },
  "details": "libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a NULL pointer dereference and memory leak in fuse_uring_init_queue allows a local user to crash the FUSE daemon or cause resource exhaustion. When numa_alloc_local fails during io_uring queue entry setup, the code proceeds with NULL pointers. When fuse_uring_register_queue fails, NUMA allocations are leaked and the function incorrectly returns success. Only the io_uring transport is affected; the traditional /dev/fuse path is not affected. PoC confirmed with AddressSanitizer/LeakSanitizer. This issue has been patched in version 3.18.2.",
  "id": "CVE-2026-33179",
  "modified": "2026-04-01T23:10:34.414597866Z",
  "published": "2026-03-20T20:20:09.171Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33179.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33179"
    },
    {
      "type": "FIX",
      "url": "https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libfuse: NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization"
}