High · 8.1 CVE-2025-30403 EUVD-2025-21179GHSA-j73w-7xx9-cq3x

A heap-buffer-overflow vulnerability is possible in mvfst via a specially crafted message during a QUIC session. This issue affects mvfst v…

Published Jul 11, 2025 · Updated Jul 11, 2025 · Assigned by facebook

Description

A heap-buffer-overflow vulnerability is possible in mvfst via a specially crafted message during a QUIC session. This issue affects mvfst versions prior to v2025.07.07.00.

Affected products

Vendor	Product	Affected	Fixed
Facebook	mvfst	v2025.03.24.00 – < v2025.07.07.00	v2025.07.07.00

References

https://www.facebook.com/security/advisories/cve-2025-30403
https://github.com/facebook/mvfst/commit/65b297332191de6e867c4a3139a233fc84c0e7e0