What is GHSA-wghw-hg6m-7rh3?

GHSA-wghw-hg6m-7rh3 is a security advisory published by GitHub Security Advisories with High severity. FatFs R0.16 and earlier contains a stack overflow bug in f_getlabel() because exFAT label length ...

Which CVE IDs does GHSA-wghw-hg6m-7rh3 cover?

GHSA-wghw-hg6m-7rh3 covers the following CVE IDs: CVE-2026-6687. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-wghw-hg6m-7rh3?

GHSA-wghw-hg6m-7rh3 has a CVSS v3 base score of 7.6, published by GitHub Security Advisories.

GHSA-wghw-hg6m-7rh3HighCVSS 7.6

FatFs R0.16 and earlier contains a stack overflow bug in f_getlabel() because exFAT label length ...

Vendor

GitHub Security Advisories

Published

July 1, 2026

Last Modified

July 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-6687 →

📋 Description

FatFs R0.16 and earlier contains a stack overflow bug in f_getlabel() because exFAT label length (XDIR_NumLabel) is trusted without enforcing spec maximums. This maps to CWE-121 (Stack-based Buffer Overflow). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (7.6, High). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2026-6687
https://elm-chan.org/fsw/ff
https://github.com/runZeroInc/vulns-2026-fatfs-chance
https://www.runzero.com/advisories/fatfs-exfat-label-len-of-cve-2026-6687
https://www.runzero.com/blog/fatfs-bugs
https://github.com/advisories/GHSA-wghw-hg6m-7rh3