{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33179","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-17T22:16:36.720Z","datePublished":"2026-03-20T20:20:09.171Z","dateUpdated":"2026-03-25T13:55:45.971Z"},"containers":{"cna":{"title":"libfuse: NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization","problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"CWE-476: NULL Pointer Dereference","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358","tags":["x_refsource_CONFIRM"],"url":"https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358"},{"name":"https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7","tags":["x_refsource_MISC"],"url":"https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7"},{"name":"https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2","tags":["x_refsource_MISC"],"url":"https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2"}],"affected":[{"vendor":"libfuse","product":"libfuse","versions":[{"version":">= 3.18.0, < 3.18.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-20T20:20:09.171Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-x669-v3mq-r358","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-25T13:55:38.887586Z","id":"CVE-2026-33179","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-25T13:55:45.971Z"}}]}}