BIG-IP Advanced WAF/ASM Crash via Undisclosed Requests (CVE-2026-22548)
CVE-2026-22548 Published on February 4, 2026
BIG-IP Advanced WAF and ASM vulnerability
When a BIG-IP Advanced WAF or ASM security policy is configured on a virtual server, undisclosed requests along with conditions beyond the attacker's control can cause the bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Vulnerability Analysis
CVE-2026-22548 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Race Condition Vulnerability?
The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
CVE-2026-22548 has been classified to as a Race Condition vulnerability or weakness.
Products Associated with CVE-2026-22548
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Affected Versions
F5 BIG-IP:- Version 21.0.0 and below * is unaffected.
- Version 17.5.0 and below * is unaffected.
- Version 17.1.0 and below 17.1.3 is affected.
- Version 16.1.0 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.