CVE-2026-39455: CWE-772: Missing Release of Resource after Effective Lifetime in F5 BIG-IP
When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd process to exhaust the available file descriptors. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI Analysis
Technical Summary
This vulnerability in F5 BIG-IP occurs when the Configuration utility uses LDAP authentication and certain traffic causes the httpd process to exhaust file descriptors due to missing resource release after their effective lifetime (CWE-772). This resource exhaustion can result in denial of service. The issue affects multiple BIG-IP versions and has a CVSS 3.1 base score of 7.5, indicating high severity. No vendor advisory or patch information is currently available, and the vulnerability is not related to cloud services.
Potential Impact
The vulnerability can cause the httpd process on affected BIG-IP devices to exhaust available file descriptors, leading to denial of service conditions. There is no impact on confidentiality or integrity reported. No known exploits are currently in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor for unusual httpd process behavior and consider limiting exposure of the LDAP authentication interface if possible.
CVE-2026-39455: CWE-772: Missing Release of Resource after Effective Lifetime in F5 BIG-IP
Description
When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd process to exhaust the available file descriptors. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in F5 BIG-IP occurs when the Configuration utility uses LDAP authentication and certain traffic causes the httpd process to exhaust file descriptors due to missing resource release after their effective lifetime (CWE-772). This resource exhaustion can result in denial of service. The issue affects multiple BIG-IP versions and has a CVSS 3.1 base score of 7.5, indicating high severity. No vendor advisory or patch information is currently available, and the vulnerability is not related to cloud services.
Potential Impact
The vulnerability can cause the httpd process on affected BIG-IP devices to exhaust available file descriptors, leading to denial of service conditions. There is no impact on confidentiality or integrity reported. No known exploits are currently in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor for unusual httpd process behavior and consider limiting exposure of the LDAP authentication interface if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-04-30T23:04:20.012Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049708cbff5d8610dff465
Added to database: 5/13/2026, 3:21:44 PM
Last enriched: 5/13/2026, 4:07:04 PM
Last updated: 5/14/2026, 6:48:23 AM
Views: 2
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