CVE-2026-33150

{"id": "CVE-2026-33150", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2026-03-20T21:17:15.410", "references": [{"url": "https://github.com/libfuse/libfuse/commit/49fcd891a58f622c098e2ca67d66086f7b213836", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/libfuse/libfuse/security/advisories/GHSA-qxv7-xrc2-qmfx", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "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 use-after-free vulnerability in the io_uring subsystem of libfuse allows a local attacker to crash FUSE filesystem processes and potentially execute arbitrary code. When io_uring thread creation fails due to resource exhaustion (e.g., cgroup pids.max), fuse_uring_start() frees the ring pool structure but stores the dangling pointer in the session state, leading to a use-after-free when the session shuts down. The trigger is reliable in containerized environments where cgroup pids.max limits naturally constrain thread creation. This issue has been patched in version 3.18.2."}], "lastModified": "2026-03-23T19:16:14.717", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:libfuse_project:libfuse:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83EF6E3E-F5F2-4CE2-B497-62493DAB2A1F", "versionEndExcluding": "3.18.2", "versionStartIncluding": "3.18.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}