CVE-2025-48008 BIG-IP MPTCP vulnerability

High 8.7 Published 15 Oct 2025 Updated 26 Feb 2026

Attackers can cause a denial of service in F5 BIG-IP by triggering a use-after-free in the Traffic Management Microkernel when MPTCP is enabled.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-48008?

CVE-2025-48008 is a high-severity use after free vulnerability in F5 Big-Ip Access Policy Manager, published on 15 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When a TCP profile with Multipath TCP (MPTCP) enabled is configured on a virtual server, undisclosed traffic along with conditions beyond the attacker's control can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-416

Which versions are affected by CVE-2025-48008?

It affects 23 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager and 17 more.

How do I fix CVE-2025-48008?

No fix has been published for CVE-2025-48008 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2025-48008 being exploited?

There is no known exploitation of CVE-2025-48008 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-gq9q-m2j6-54f2.