CVE-2026-6685

This CVE ID has been rejected or withdrawn by its CVE Numbering Authority following a notification that the vulnerability determination was made in error. After review, the CNA confirmed the erroneous finding. Thanks to David Brown for reaching out about this issue...

CVE-2026-6685

CVE-2026-6685 refers to an Integer Underflow in FatFs during dirty-sector cache flush when handling fragmented volumes. Affected software is FatFs R0.16 and earlier; the issue arises from an unsigned-subtraction wrap in cache handling (fp->sect vs. sect) during interleaved read/write, which ca...

EUVD-2026-40996

FatFs R0.16 and earlier exhibits a stale dirty-cache skip via unsigned-subtraction wrap in fread / fwrite fp-sect - sect cc during interleaved read/write on fragmented filesystems. This maps to CWE-191 Integer Underflow. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H 6.1...