CVE-2026-34019

BIG-IP BFD vulnerability

State: Published
Severity: 6.3 Medium
Published: May 13, 2026
Updated: May 13, 2026
Reserved: Apr 30, 2026

Description

When Bidirectional Forwarding Detection (BFD) is configured in Static and Dynamic routing protocols, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to stop processing BFD packets and cause the configured routing protocol to fail over. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	f5
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	f5

Weaknesses

CWE-410 Insufficient Resource Pool

Affected Products

Product	Versions
BIG-IPF5	21.0.0 and laterNot affected 17.5.0 to before 17.5.1Affected 17.1.0 to before 17.1.3Affected 16.1.0 and laterAffected

References

https://my.f5.com/manage/s/article/K000150508vendor-advisorypatch

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