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.
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Fixes
Solution
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References
History
Wed, 01 Jul 2026 16:30:00 +0000
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ssvc
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Wed, 01 Jul 2026 14:30:00 +0000
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| 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. | |
| Title | FatFs Infinite Loop in GPT Partition Scan | |
| Weaknesses | CWE-835 | |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: runZero
Published:
Updated: 2026-07-01T15:25:53.071Z
Reserved: 2026-04-20T15:06:20.061Z
Link: CVE-2026-6684
Updated: 2026-07-01T15:25:49.136Z
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OpenCVE Enrichment
Updated: 2026-07-01T18:30:15Z
Weaknesses