CVE-2021-24029

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-617

Affected software

Vendor	Product	Versions
Facebook	mvfst	>= unspecified, < a67083ff4b8dcbb7ee2839da6338032030d712b0
Facebook	proxygen	>= unspecified, < v2021.03.15.00

References

https://github.com/facebookincubator/mvfst/commit/a67083ff4b8dcbb7ee2839da6338032030d712b0Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2021-24029Vendor Advisory
https://github.com/facebookincubator/mvfst/commit/a67083ff4b8dcbb7ee2839da6338032030d712b0Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2021-24029Vendor Advisory

Timeline

Published: Mar 15, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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