Heap-based Buffer Overflow Affecting facebook/mvfst package, versions [2025.03.24.00,2025.07.07.00)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-FACEBOOKMVFST-10734139
- published14 Jul 2025
- disclosed11 Jul 2025
- creditUnknown
Introduced: 11 Jul 2025
CVE-2025-30403 (opens in a new tab)How to fix?
Upgrade facebook/mvfst to version 2025.07.07.00 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via specially crafted messages during a QUIC session. An attacker can cause a heap buffer overflow by sending maliciously constructed input to the affected process.