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CVE-2025-30403

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Date: July 11, 2025

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.

Severity Score

Related Resources (4)

https://nvd.nist.gov/vuln/detail/CVE-2025-30403
https://github.com/facebook/mvfst/commit/65b297332191de6e867c4a3139a233fc84c0e7e0
https://www.facebook.com/security/advisories/cve-2025-30403
https://www.mend.io/vulnerability-database/CVE-2025-30403

Severity Score

Top Fix

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Upgrade Version

Upgrade to version https://github.com/facebook/mvfst.git - v2025.07.07.00

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): HIGH

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