CVE-2021-22999: F5 On vulnerability
This F5 advisory covers CVE-2021-22999. Related products: BIG-IP.
- CVE-2021-22999
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Versions named
- 15.0.x; 14.1.x
- Fixed in
- 15.1.0, 14.1.4
- Source published
- Source revised
- Listed by VulniPulse
- Record changed
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Related products & platforms
Description
On versions 15.0.x before 15.1.0 and 14.1.x before 14.1.4, the BIG-IP system provides an option to connect HTTP/2 clients to HTTP/1.x servers. When a client is slow to accept responses and it closes a connection prematurely, the BIG-IP system may indefinitely retain some streams unclosed.
Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
Text from the source record.
- 15.0.x
- 14.1.x
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2021-22999
Upgrade to a fixed release named by F5:
- 15.1.0
- 14.1.4
Support dates for the fixed release lines
- F5 BIG-IP 15.1: support ended
- F5 BIG-IP 14.1: support ended
More F5 advisories
CVE-2026-94127Sep 22, 2026When a BIG-IP APM access policy and an OAuth profile are configured on a virtual serverCVE-2026-66842Sep 2, 2026BIG-IP vulnerabilityCVE-2026-59762Jul 15, 2026BIG-IP: When an HTTP/2 profile is configured on a virtual server, undisclosed requestsCVE-2026-39458May 13, 2026When a BIG-IP is configured with DNS cachingCVE-2025-58071Oct 15, 2025When IPsec is configured on the BIG-IP system, undisclosed trafficCVE-2025-54854Oct 15, 2025When a BIG-IP APM OAuth access profile (Resource Server or Resource Client) is configured
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