{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-6683 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-6683 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-6683 is a medium-severity denial of service vulnerability in ChaN FatFs, published on 1 Jul 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-2026-6683 and fix it if it is affected.\n\nWhat it is: CVE-2026-6683 is a medium-severity denial of service vulnerability in ChaN FatFs, published on 1 Jul 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-2026-6683 in the wild and no public exploit code.\n\nAffected product: ChaN FatFs. 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-2026-6683/ (Markdown: https://insights.sbomify.com/CVE-2026-6683/index.md)","id":"CVE-2026-6683","markdown":"https://insights.sbomify.com/CVE-2026-6683/index.md","name":"CVE-2026-6683","record":{"aliases":["GHSA-74cg-p8q3-4c3q"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"FatFs file system library","requires_auth":"none","summary":"Attackers can cause a denial of service in FatFs via crafted exFAT metadata triggering a divide-by-zero error during sync operations.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"runZero","cpe":[{"product":"fatfs","vendor":"elm-chan"}],"cvss":{"score":4.6,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-369","name":"Divide By Zero"}],"description":"FatFs R0.16 and earlier contains a divide-by-zero in exFAT sync logic bug when crafted metadata causes n_fatent - 2 to be zero during write/sync operations. This maps to CWE-369 (Divide By Zero). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (4.6, Medium). Network-delivered update media can make this remote in some pipelines. The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"FatFs Divide-by-Zero in exFAT Sync","id":"CVE-2026-6683","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"FatFs Infinite Loop in GPT Partition Scan","id":"CVE-2026-6684"},"packages":[],"prev":{"headline":"FatFs Integer Overflow in FAT32 Volume Mount","id":"CVE-2026-6682"},"products":["FatFs"],"published":"2026-07-01","related":[{"cvss_score":7.6,"headline":"FatFs Integer Overflow in FAT32 Volume Mount","id":"CVE-2026-6682","kev_date_added":null,"published":"2026-07-01"},{"cvss_score":7.6,"headline":"FatFs Stack Buffer Overflow via Uncapped exFAT Label Length","id":"CVE-2026-6687","kev_date_added":null,"published":"2026-07-01"},{"cvss_score":7.6,"headline":"FatFs Buffer Overflow via Unbounded LFN Filename Copy","id":"CVE-2026-6688","kev_date_added":null,"published":"2026-07-01"},{"cvss_score":4.6,"headline":"FatFs Infinite Loop in GPT Partition Scan","id":"CVE-2026-6684","kev_date_added":null,"published":"2026-07-01"},{"cvss_score":4.6,"headline":"FatFs Use of Uninitialized Clusters After Seek Past EOF","id":"CVE-2026-6686","kev_date_added":null,"published":"2026-07-01"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-07-01","vendors":["ChaN"]},"summary":"Attackers can cause a denial of service in FatFs via crafted exFAT metadata triggering a divide-by-zero error during sync operations.","url":"https://insights.sbomify.com/CVE-2026-6683/"}