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CVE-2026-6685

🗓️ 01 Jul 2026 13:47:25Reported by runZeroType 
cve
 cve
🔗 web.nvd.nist.gov👁 5 Views

FatFs CVE-2026-6685 affects FatFs R0.16 and earlier, where a stale dirty-cache skip can occur due to an unsigned-subtraction wrap in f_read() and f_write() during interleaved reads/writes on fragmented filesystems (fp->sect - sect < cc). The...

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-6685
1 Jul 202613:47
attackerkb
Cvelist
CVE-2026-6685 FatFs Integer Underflow in Dirty-Sector Cache Flush
1 Jul 202613:47
cvelist
EUVD
EUVD-2026-40996
1 Jul 202613:47
euvd
NVD
CVE-2026-6685
1 Jul 202615:17
nvd
Vulnrichment
CVE-2026-6685 FatFs Integer Underflow in Dirty-Sector Cache Flush
1 Jul 202613:47
vulnrichment
[
  {
    "vendor": "ChaN",
    "product": "FatFs",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThanOrEqual": "R0.16",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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01 Jul 2026 18:31Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.1
SSVC
5