CVE-2026-42920

When a Client SSL profile is configured with Allow Dynamic Record Sizing on a UDP virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Score

CVSS 4.0 8.7 High

Status

Analyzed - f5sirt@f5.com

Published

2026-05-13

Last modified

2026-10-26

Weaknesses

CWE-835

Affected products

• Big-ip (F5)
• Big-ip Access Policy Manager (F5)
• Big-ip Advanced Firewall Manager (F5)
• Big-ip Advanced Web Application Firewall (F5)
• Big-ip Analytics (F5)
• Big-ip Application Acceleration Manager (F5)
• Big-ip Application Security Manager (F5)
• Big-ip Application Visibility And Reporting (F5)
• Big-ip Automation Toolchain (F5)
• Big-ip Carrier-grade Nat (F5)
• Big-ip Container Ingress Services (F5)
• Big-ip Ddos Hybrid Defender (F5)
• Big-ip Domain Name System (F5)
• Big-ip Edge Gateway (F5)
• Big-ip Fraud Protection Service (F5)
• Big-ip Global Traffic Manager (F5)
• Big-ip Link Controller (F5)
• Big-ip Local Traffic Manager (F5)
• Big-ip Policy Enforcement Manager (F5)
• Big-ip Ssl Orchestrator (F5)
• Big-ip Webaccelerator (F5)
• Big-ip Websafe (F5)

References

• https://my.f5.com/manage/s/article/K000160901