F5 BIG-IP ASM Process Crash via Malformed JSON Schema
CVE-2025-54858 Published on October 15, 2025
BIG-IP Advanced WAF and ASM vulnerability
When a BIG-IP Advanced WAF or BIG-IP ASM Security Policy is configured with a JSON content profile that has a malformed JSON schema, and the security policy is applied to a virtual server, undisclosed requests can cause the bd process to terminate.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Vulnerability Analysis
CVE-2025-54858 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low 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 Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2025-54858 has been classified to as a Stack Exhaustion vulnerability or weakness.
Products Associated with CVE-2025-54858
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Affected Versions
F5 BIG-IP:- Version 17.5.0 and below 17.5.1.3 is affected.
- Version 17.1.0 and below 17.1.3 is affected.
- Version 16.1.0 and below 16.1.6.1 is affected.
- Version 15.1.0 and below 15.1.10.8 is affected.
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.