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CVE-2026-33179

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:81fcd4144f2da2fb2fd5ac95ce9c019bfc4c41db94aad5bd27d162fa840ad223
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"libfuse","vendor":"libfuse","versions":[{"status":"affected","version":">= 3.18.0, < 3.18.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:929c8daf2f42ff37dd33da8372a694934bc68ad76e3e25dff4661f27f7f5bc38 · sha256:1ae1797b68b18564… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:929c8daf2f42ff37dd33da8372a694934bc68ad76e3e25dff4661f27f7f5bc38 · sha256:1ae1797b68b18564… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:929c8daf2f42ff37dd33da8372a694934bc68ad76e3e25dff4661f27f7f5bc38 · sha256:1ae1797b68b18564… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7","tags":["x_refsource_MISC"],"url":"https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:929c8daf2f42ff37dd33da8372a694934bc68ad76e3e25dff4661f27f7f5bc38 · sha256:1ae1797b68b18564… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:929c8daf2f42ff37dd33da8372a694934bc68ad76e3e25dff4661f27f7f5bc38 · sha256:1ae1797b68b18564… · /containers/cna/references/2
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:929c8daf2f42ff37dd33da8372a694934bc68ad76e3e25dff4661f27f7f5bc38 · sha256:1ae1797b68b18564… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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