SB2026051451 - Remote denial of service in BIG-IP products TMM module

Description

This security bulletin contains information about 1 vulnerability.

1) Stack-based buffer overflow (CVE-ID: CVE-2026-41956)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: 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/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to stack-based buffer overflow in the Traffic Management Microkernel (TMM) classification handling on a UDP virtual server when processing undisclosed requests. A remote attacker can send crafted requests to cause a denial of service.

Only the data plane is exposed; there is no control plane exposure. Exploitation requires a classification profile to be configured on a UDP virtual server.

Remediation

Install update from vendor's website.

References

• https://my.f5.com/manage/s/article/K000158038