CVE-2025-30403

high

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.

References

https://www.facebook.com/security/advisories/cve-2025-30403

https://github.com/facebook/mvfst/commit/65b297332191de6e867c4a3139a233fc84c0e7e0

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-21179

Details

Source: Mitre, NVD

Published: 2025-07-11

Updated: 2026-04-15

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:C

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H