PT-2026-40664 · F5 · Big-Ip+2

Published 2026-05-13 · Updated 2026-05-17 · CVE-2026-41956

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions F5 BIG-IP (affected versions not specified) F5 BIG-IP Next CNF (affected versions not specified) F5 BIG-IP Next for Kubernetes (affected versions not specified)

Description A stack-based overflow in the Traffic Management Microkernel (TMM) can be triggered when a classification profile is configured on a UDP virtual server. This issue allows undisclosed requests to cause the TMM to terminate.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-41956

Affected Products

Big-Ip

Big-Ip Next Cnf

Big-Ip Next For Kubernetes

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-41956 · Security Note
• https://my.f5.com/manage/s/article/K000158038 · Patch, Vendor Advisory
• https://twitter.com/f1tym1/status/2056002980017545462 · Twitter Post