CVE-2026-42920

EUVD-2026-30004
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.
Infinite Loop
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
f5CNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
f5big-ip
21.0.0 ≤
𝑥
< 21.0.0.1
CNA
f5big-ip
17.5.0 ≤
𝑥
< 17.5.1.4
CNA
f5big-ip
17.1.0 ≤
𝑥
< 17.1.3.1
CNA
Common Weakness Enumeration
References
https://my.f5.com/manage/s/article/K000160901