Use After Free in F5 Big-Ip
CVE-2025-48008
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.
Vulnerability class: Use-After-Free
EPSS: 0.004 (34.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- F5 Big-ip — versions 17.5.0, 17.1.0, 16.1.0
- 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
- F5 Big-ip_application_visibility_and_reporting
- F5 Big-ip_automation_toolchain
- F5 Big-ip_carrier-grade_nat
Weakness classification (CWE)
References
- f5sirt@f5.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-48008?
- CVE-2025-48008 is a high-severity vulnerability in F5 Big-Ip, classified under Use After Free. CVSS score: 7.5/10. Published 2025-10-15.
- How severe is CVE-2025-48008?
- High severity. CVSS v3 base score is 7.5 out of 10.