{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-93689 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-93689 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-93689 is a medium-severity vulnerability in winfsp, published on 18 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-93689 and fix it if it is affected.\n\nWhat it is: CVE-2026-93689 is a medium-severity vulnerability in winfsp, published on 18 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-93689 in the wild and no public exploit code.\n\nAffected product: winfsp. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-93689/ (Markdown: https://insights.sbomify.com/CVE-2026-93689/index.md)","id":"CVE-2026-93689","markdown":"https://insights.sbomify.com/CVE-2026-93689/index.md","name":"CVE-2026-93689","record":{"aliases":["GHSA-grx3-v6wv-8gq8"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Windows file system driver","requires_auth":"low_privilege","summary":"An unprivileged local user can cause a system crash by triggering a null pointer dereference in the WinFsp kernel driver's Fast I/O handler.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"WinFsp through 2.2.26215 contains a null pointer dereference vulnerability in the kernel driver's Fast I/O device control handler that fails to validate the volume context before use. An unprivileged local user can trigger a denial of service by opening the WinFsp control device and issuing FSP_IOCTL_TRANSACT requests, causing a system crash.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"WinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O","id":"CVE-2026-93689","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"uri-js through 4.4.1 Denial of Service via removeDotSegments","id":"CVE-2026-93690"},"packages":[],"prev":{"headline":"SGLang through 0.5.19 Unbounded Memory Allocation via bootstrap_room","id":"CVE-2026-93688"},"products":["winfsp"],"published":"2026-09-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-24","vendors":["winfsp"]},"summary":"An unprivileged local user can cause a system crash by triggering a null pointer dereference in the WinFsp kernel driver's Fast I/O handler.","url":"https://insights.sbomify.com/CVE-2026-93689/"}