SB2026051432 - Remote denial of service in BIG-IP DTLS

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Main Vulnerability Database SB2026051432

SB2026051432 - Remote denial of service in BIG-IP DTLS

Published: May 14, 2026

Security Bulletin ID SB2026051432
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Infinite loop (CVE-ID: CVE-2026-42920)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to loop with unreachable exit condition in the Client SSL profile when processing undisclosed traffic on a UDP virtual server with Allow Dynamic Record Sizing enabled. A remote attacker can send traffic to cause a denial of service.

Only the data plane is exposed; there is no control plane exposure. Traffic is disrupted while the TMM process restarts.


Remediation

Install update from vendor's website.

References