Use After Free in Facebook Proxygen
CVE-2019-11940
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…
Vulnerability class: Use-After-Free
EPSS: 0.014 (68.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Facebook Proxygen — versions v2017.04.03.00, v0.29.0, unspecified
Weakness classification (CWE)
References
- cve-assign@fb.com (Patch, Third Party Advisory, x_refsource_MISC)
- cve-assign@fb.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11940?
- CVE-2019-11940 is a critical-severity vulnerability in Facebook Proxygen, classified under Use After Free. CVSS score: 9.8/10. Published 2019-12-04.
- How severe is CVE-2019-11940?
- Critical severity. CVSS v3 base score is 9.8 out of 10.