CVE-2019-11922
CVE-2019-11922 is a high-severity vulnerability in Facebook Zstandard with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.
Key facts
- Severity: High (CVSS 3.x base score 8.1)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (70th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-362
- Affected product: Facebook Zstandard
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2019-11922?
- 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.
- How severe is CVE-2019-11922?
- CVE-2019-11922 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-11922 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-11922?
- CVE-2019-11922 affects Facebook Zstandard. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-11922?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2019-11922 published?
- CVE-2019-11922 was published on 2019-07-25 and last updated on 2026-06-17.
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
Affected products (1)
- cpe:2.3:a:facebook:zstandard:*:*:*:*:*:*:*:*
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