CVE-2025-54500

HTTP/2 Vulnerability

State: Published
Severity: 6.9 Medium
Published: Aug 13, 2025
Updated: Nov 3, 2025
Reserved: Jul 29, 2025

Description

An HTTP/2 implementation flaw allows a denial-of-service (DoS) that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit (HTTP/2 MadeYouReset Attack).

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/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-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
BIG-IPF5	17.5.0 and laterAffected 17.1.0 and laterAffected 16.1.0 and laterAffected 15.1.0 and laterAffected
BIG-IP NextF5	20.3.0 and laterAffected
BIG-IP Next SPKF5	2.0.0 and laterAffected 1.7.0 and laterAffected
BIG-IP Next CNFF5	2.0.0 and laterAffected 1.1.0 and laterAffected
BIG-IP Next for KubernetesF5	2.0.0 and laterAffected

References

https://my.f5.com/manage/s/article/K000152001vendor-advisory
https://www.kb.cert.org/vuls/id/767506

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