What’s Vulnerable › Vulnerabilities

CVE-2019-11922

• Severity: high (CVSS 8.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-25 · updated 2026-06-17
• Weakness: CWE-362

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.

Affected products

• Facebook Zstandard: before 1.3.8 — fixed in 1.3.8

How to fix

Upgrade to a fixed version: Facebook Zstandard 1.3.8. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00062.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00078.html
• https://github.com/facebook/zstd/pull/1404/commits/3e5cdf1b6a85843e991d7d10f6a2567c15580da0
• https://usn.ubuntu.com/4108-1/
• https://www.facebook.com/security/advisories/cve-2019-11922
• https://www.oracle.com/security-alerts/cpuoct2020.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00062.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00078.html
• https://github.com/facebook/zstd/pull/1404/commits/3e5cdf1b6a85843e991d7d10f6a2567c15580da0
• https://usn.ubuntu.com/4108-1/

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