What’s Vulnerable › Vulnerabilities
CVE-2021-22996
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-03-31 · updated 2026-06-17
Description
On all 7.x versions (fixed in 8.0.0), when set up for auto failover, a BIG-IQ Data Collection Device (DCD) cluster member that receives an undisclosed message may cause the corosync process to abort. This behavior may lead to a denial-of-service (DoS) and impact the stability of a BIG-IQ high availability (HA) cluster. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
Affected products
- F5 BIG-IQ: from 7.0.0 before 8.0.0 — fixed in 8.0.0
How to fix
Upgrade to a fixed version: F5 BIG-IQ 8.0.0. Check the vendor advisory for mitigations.
References
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