CVE-2025-30403

Published: Jul 11, 2025Updated: Jul 15, 2025 Sources: CVE List NVD

8.1HIGH

NVD MITRE

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:HAvailability

High

Open in CVSS calculator →

Affected Products

Facebook

commercial·USaka meta, facebook inc.

mvfst

Communications

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Is your org exposed to CVE-2025-30403?We can run the check for you — a free external exposure review, no install. Check my exposure

References

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

github.com

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

facebook.com

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-30403 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows