CVE-2023-22664 BIG-IP HTTP/2 profile vulnerability

High 7.5 Published 1 Feb 2023 Updated 26 Mar 2025

Attackers can cause memory exhaustion and denial of service on F5 BIG-IP devices by sending specific HTTP/2 requests when certain profiles are enabled.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-22664?

CVE-2023-22664 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 1 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP versions 17.0.x before 17.0.0.2 and 16.1.x before 16.1.3.3, and BIG-IP SPK starting in version 1.6.0, when a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-400

Which versions are affected by CVE-2023-22664?

It affects 13 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Ddos Hybrid Defender and 7 more.

How do I fix CVE-2023-22664?

No fix has been published for CVE-2023-22664 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-22664 being exploited?

There is no known exploitation of CVE-2023-22664 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-3447-4454-25p2.