Unauthenticated bd process crash via uncontrolled recursion
Published Oct 15, 2025 · Updated Oct 15, 2025
Uncontrolled recursion in F5 BIG-IP Advanced WAF and ASM allows remote attackers to crash the bd process through undisclosed requests. The bd process applies requests to a malformed JSON schema and recurses without a sufficient termination condition; F5 has not disclosed the request form or internal routine. The security policy must use that malformed schema and be applied to a virtual server, and the reported consequence is process termination without data disclosure or modification.
Summary
What happened
Uncontrolled recursion in F5 BIG-IP Advanced WAF and ASM allows remote attackers to crash the bd process through undisclosed requests. The bd process applies requests to a malformed JSON schema and recurses without a sufficient termination condition; F5 has not disclosed the request form or internal routine. The security policy must use that malformed schema and be applied to a virtual server, and the reported consequence is process termination without data disclosure or modification.
The record
- CVE
- CVE-2025-54858
- Published
- Oct 15, 2025
- Updated
- Oct 15, 2025
- Vendor
- F5 Networks
- Product
- BIG-IP
- Classifications
- CWE-674, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 15, 2025CVE publishedPublication date reported by the CVE source.
- Oct 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.1.0 <15.1.10.8
- Affected versionversion=16.1.0 <16.1.6.1
- Affected versionversion=17.1.0 <17.1.3
- Affected versionversion=17.5.0 <17.5.1.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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