CVE-2026-42920

Summary

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.

Affected Software

VendorProductVersion RangeStatus
F5BIG-IP21.1.0 < *unaffected
F5BIG-IP21.0.0 < 21.0.0.1affected
F5BIG-IP17.5.0 < 17.5.1.4affected
F5BIG-IP17.1.0 < 17.1.3.1affected
F5BIG-IP16.1.0 < *affected

Weaknesses

  • CWE-835: CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References