CVE-2019-11922 Race condition in Zstandard
A race condition in Zstandard's one-pass compression allows attackers to write bytes out of bounds if a small output buffer is used, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-11922?
CVE-2019-11922 is a high-severity vulnerability in Facebook Zstandard, published on 25 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.
Weakness: CWE-362
Which versions are affected by CVE-2019-11922?
It affects 1 product.
Linux distribution packages (5)
zstd SUSE:Package Hub 15 | All versions | 1.4.2-bp151.4.3.1 |
zstd SUSE:Package Hub 15 SP1 | All versions | 1.4.2-bp151.4.3.1 |
zstd openSUSE:Leap 15.0 | All versions | 1.4.2-lp150.2.3.1 |
zstd openSUSE:Leap 15.1 | All versions | 1.4.2-lp151.3.3.1 |
zstd openSUSE:Tumbleweed | All versions | 1.5.0-1.13 |
Products include Facebook Zstandard.
How do I fix CVE-2019-11922?
Upgrade to a fixed version.
Is CVE-2019-11922 being exploited?
There is no known exploitation of CVE-2019-11922 in the wild and no public exploit code.
Other vulnerabilities in Facebook Zstandard
Sources
Also known as ALPINE-CVE-2019-11922, CLEANSTART-2025-JH01650, DEBIAN-CVE-2019-11922, MGASA-2019-0257, UBUNTU-CVE-2019-11922, USN-4108-1 and 5 more.