VULNERABILITY INTELLIGENCE

CVE-2019-11940

CVSS score9.8 CRITICAL

EPSS probability1.36%

CISA KEVNot currently listed

Published2019-12-04

Last modified2026-06-17

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

Description

In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations can place the header table into a corrupted state, leading to a use-after-free condition and undefined behavior. This issue affects Proxygen from v0.29.0 until v2017.04.03.00.

Weakness classification

CWE-416: Use After Free

Primary references

cve-assign@fb.com — Patch, Third Party Advisory
cve-assign@fb.com — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory