CVE-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.

8.1

CVSS

Severity: High

CVSS 3.1 •

Affected: Facebook mvfst

References

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

Frequently Asked Questions

What is the severity of CVE-2025-30403?: CVE-2025-30403 has been scored as a high severity vulnerability.
How to fix CVE-2025-30403?: To fix CVE-2025-30403, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-30403 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-30403 is being actively exploited.
What software or system is affected by CVE-2025-30403?: CVE-2025-30403 affects Facebook mvfst.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.