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HIGHCVE-2026-42920Published Modified CNA f5

CVE-2026-42920: BIG-IP DTLS Vulnerability

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.

Metrics

CVSS v4.0
8.7
Severity
HIGH
Fixed in
*
Affected Products
1

Fix available

*17.1.3.117.5.1.421.0.0.121.1.0
Patch commits
Affected packages
  • F5 / BIG-IP
    < 21.0.0.1 (from 21.0.0) · < 17.5.1.4 (from 17.5.0) · < 17.1.3.1 (from 17.1.0) · < * (from 16.1.0)
    Fixed in 21.1.0
CVSS Vector
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
References