BIG-IP Advanced WAF URL Length >1024 Causing bd Process Crash
CVE-2025-61938 Published on October 15, 2025
BIG-IP Advanced WAF and ASM bd process vulnerability
When a BIG-IP Advanced WAF or ASM security policy is configured with a URL greater than 1024 characters in length for the Data Guard Protection Enforcement setting, either manually or through the automatic Policy Builder, the bd process can terminate repeatedly. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Vulnerability Analysis
CVE-2025-61938 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
Improper Validation of Specified Quantity in Input
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
Products Associated with CVE-2025-61938
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Affected Versions
F5 BIG-IP:- Version 17.5.0 and below 17.5.1 is affected.
- Version 17.1.0 and below 17.1.3 is affected.
- Version 16.1.0 and below * is unaffected.
- Version 15.1.0 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.