CVE-2025-30403HIGH 8.1EPSS p20.4%

CVE-2025-30403CVE-2025-30403

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
EPSS0.29% probability of exploitation · percentile 20.4% · 2026-06-19T12:03:05Z
Published2025-07-11
Last modified2026-04-15

References

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

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.