{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6684 exists.","fix":"No fix has been published for CVE-2026-6684 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-6684 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-2026-6684 and fix it if it is affected.\n\nWhat it is: CVE-2026-6684 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6684 exists.\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-2026-6684/ (Markdown: https://insights.sbomify.com/CVE-2026-6684/index.md)","id":"CVE-2026-6684","markdown":"https://insights.sbomify.com/CVE-2026-6684/index.md","name":"CVE-2026-6684","record":{"aliases":["GHSA-vhc7-qgwj-vx6v"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"FatFs file system library","requires_auth":"none","summary":"An attacker with physical access can cause a denial of service via an infinite loop during GPT partition scanning in FatFs when 64-bit LBA support is enabled.","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-835","name":"Loop with Unreachable Exit Condition"}],"description":"FatFs prior to R0.16 that use GPT scanning with 'FF_LBA64 = 1' contains an issue where an unbounded loop count derived from GPT header field GPTH_PtNum, enabling extremely long or effectively infinite mount-time scans. This maps to CWE-835 (Loop with Unreachable Exit Condition). 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). 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":"weaponised"},"has_fix":null,"headline":"FatFs Infinite Loop in GPT Partition Scan","id":"CVE-2026-6684","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":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority following a notification that the vulnerability determination was made in error.","id":"CVE-2026-6685"},"packages":[],"prev":{"headline":"FatFs Divide-by-Zero in exFAT Sync","id":"CVE-2026-6683"},"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 Divide-by-Zero in exFAT Sync","id":"CVE-2026-6683","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-01","vendors":["ChaN"]},"summary":"An attacker with physical access can cause a denial of service via an infinite loop during GPT partition scanning in FatFs when 64-bit LBA support is enabled.","url":"https://insights.sbomify.com/CVE-2026-6684/"}