CVE-2026-41218

Published: May 13, 2026Modified: Jun 24, 2026

8.7

Vector

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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: f5sirt@f5.com (Secondary)

Description

When BIG-IP PEM iRules are configured on a virtual server (iRules using commands starting with CLASSIFICATION::, CLASSIFY::, PEM::, PSC::, and the urlcatquery command), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected (84)

Products: F5: Big Ip Access Policy Manager, Big Ip Advanced Firewall Manager, Big Ip Advanced Web Application Firewall, Big Ip Analytics, Big Ip Application Acceleration Manager, Big Ip Application Security Manager, Big Ip Application Visibility And Reporting, Big Ip Automation Toolchain, Big Ip Carrier Grade Nat, Big Ip Container Ingress Services, Big Ip Ddos Hybrid Defender, Big Ip Domain Name System, Big Ip Edge Gateway, Big Ip Fraud Protection Service, Big Ip Global Traffic Manager, Big Ip Link Controller, Big Ip Local Traffic Manager, Big Ip Policy Enforcement Manager, Big Ip Ssl Orchestrator, Big Ip Webaccelerator, Big Ip Websafe

21 products

Big Ip Access Policy Manager

Big Ip Advanced Firewall Manager

Big Ip Advanced Web Application Firewall

Big Ip Analytics

Big Ip Application Acceleration Manager

Big Ip Application Security Manager

Big Ip Application Visibility And Reporting

Big Ip Automation Toolchain

Big Ip Carrier Grade Nat

Big Ip Container Ingress Services

Big Ip Ddos Hybrid Defender

Big Ip Domain Name System

Big Ip Edge Gateway

Big Ip Fraud Protection Service

Big Ip Global Traffic Manager

Big Ip Link Controller

Big Ip Local Traffic Manager

Big Ip Policy Enforcement Manager

Big Ip Ssl Orchestrator

Big Ip Webaccelerator

Big Ip Websafe

Configuration A

42 vulnerable

Vulnerable Software	Affected Versions
F5 Big Ip Access Policy Manager	From 17.1.0 to 17.1.3
F5 Big Ip Access Policy Manager	From 17.5.0 to 17.5.1
F5 Big Ip Advanced Firewall Manager	From 17.1.0 to 17.1.3
F5 Big Ip Advanced Firewall Manager	From 17.5.0 to 17.5.1
F5 Big Ip Advanced Web Application Firewall	From 17.1.0 to 17.1.3
F5 Big Ip Advanced Web Application Firewall	From 17.5.0 to 17.5.1
F5 Big Ip Analytics	From 17.1.0 to 17.1.3
F5 Big Ip Analytics	From 17.5.0 to 17.5.1
F5 Big Ip Application Acceleration Manager	From 17.1.0 to 17.1.3
F5 Big Ip Application Acceleration Manager	From 17.5.0 to 17.5.1
F5 Big Ip Application Security Manager	From 17.1.0 to 17.1.3
F5 Big Ip Application Security Manager	From 17.5.0 to 17.5.1
F5 Big Ip Application Visibility And Reporting	From 17.1.0 to 17.1.3
F5 Big Ip Application Visibility And Reporting	From 17.5.0 to 17.5.1
F5 Big Ip Automation Toolchain	From 17.1.0 to 17.1.3
F5 Big Ip Automation Toolchain	From 17.5.0 to 17.5.1
F5 Big Ip Carrier Grade Nat	From 17.1.0 to 17.1.3
F5 Big Ip Carrier Grade Nat	From 17.5.0 to 17.5.1
F5 Big Ip Container Ingress Services	From 17.1.0 to 17.1.3
F5 Big Ip Container Ingress Services	From 17.5.0 to 17.5.1
F5 Big Ip Ddos Hybrid Defender	From 17.1.0 to 17.1.3
F5 Big Ip Ddos Hybrid Defender	From 17.5.0 to 17.5.1
F5 Big Ip Domain Name System	From 17.1.0 to 17.1.3
F5 Big Ip Domain Name System	From 17.5.0 to 17.5.1
F5 Big Ip Edge Gateway	From 17.1.0 to 17.1.3
F5 Big Ip Edge Gateway	From 17.5.0 to 17.5.1
F5 Big Ip Fraud Protection Service	From 17.1.0 to 17.1.3
F5 Big Ip Fraud Protection Service	From 17.5.0 to 17.5.1
F5 Big Ip Global Traffic Manager	From 17.1.0 to 17.1.3
F5 Big Ip Global Traffic Manager	From 17.5.0 to 17.5.1
F5 Big Ip Link Controller	From 17.1.0 to 17.1.3
F5 Big Ip Link Controller	From 17.5.0 to 17.5.1
F5 Big Ip Local Traffic Manager	From 17.1.0 to 17.1.3
F5 Big Ip Local Traffic Manager	From 17.5.0 to 17.5.1
F5 Big Ip Policy Enforcement Manager	From 17.1.0 to 17.1.3
F5 Big Ip Policy Enforcement Manager	From 17.5.0 to 17.5.1
F5 Big Ip Ssl Orchestrator	From 17.1.0 to 17.1.3
F5 Big Ip Ssl Orchestrator	From 17.5.0 to 17.5.1
F5 Big Ip Webaccelerator	From 17.1.0 to 17.1.3
F5 Big Ip Webaccelerator	From 17.5.0 to 17.5.1
F5 Big Ip Websafe	From 17.1.0 to 17.1.3
F5 Big Ip Websafe	From 17.5.0 to 17.5.1

Configuration B

21 vulnerable

Vulnerable Software	Affected Versions
F5 Big Ip Access Policy Manager	From 16.1.0 to 16.1.6
F5 Big Ip Advanced Firewall Manager	From 16.1.0 to 16.1.6
F5 Big Ip Advanced Web Application Firewall	From 16.1.0 to 16.1.6
F5 Big Ip Analytics	From 16.1.0 to 16.1.6
F5 Big Ip Application Acceleration Manager	From 16.1.0 to 16.1.6
F5 Big Ip Application Security Manager	From 16.1.0 to 16.1.6
F5 Big Ip Application Visibility And Reporting	From 16.1.0 to 16.1.6
F5 Big Ip Automation Toolchain	From 16.1.0 to 16.1.6
F5 Big Ip Carrier Grade Nat	From 16.1.0 to 16.1.6
F5 Big Ip Container Ingress Services	From 16.1.0 to 16.1.6
F5 Big Ip Ddos Hybrid Defender	From 16.1.0 to 16.1.6
F5 Big Ip Domain Name System	From 16.1.0 to 16.1.6
F5 Big Ip Edge Gateway	From 16.1.0 to 16.1.6
F5 Big Ip Fraud Protection Service	From 16.1.0 to 16.1.6
F5 Big Ip Global Traffic Manager	From 16.1.0 to 16.1.6
F5 Big Ip Link Controller	From 16.1.0 to 16.1.6
F5 Big Ip Local Traffic Manager	From 16.1.0 to 16.1.6
F5 Big Ip Policy Enforcement Manager	From 16.1.0 to 16.1.6
F5 Big Ip Ssl Orchestrator	From 16.1.0 to 16.1.6
F5 Big Ip Webaccelerator	From 16.1.0 to 16.1.6
F5 Big Ip Websafe	From 16.1.0 to 16.1.6

Configuration C

21 vulnerable

Vulnerable Software	Affected Versions
F5 Big Ip Access Policy Manager	Version 21.0.0
F5 Big Ip Advanced Firewall Manager	Version 21.0.0
F5 Big Ip Advanced Web Application Firewall	Version 21.0.0
F5 Big Ip Analytics	Version 21.0.0
F5 Big Ip Application Acceleration Manager	Version 21.0.0
F5 Big Ip Application Security Manager	Version 21.0.0
F5 Big Ip Application Visibility And Reporting	Version 21.0.0
F5 Big Ip Automation Toolchain	Version 21.0.0
F5 Big Ip Carrier Grade Nat	Version 21.0.0
F5 Big Ip Container Ingress Services	Version 21.0.0
F5 Big Ip Ddos Hybrid Defender	Version 21.0.0
F5 Big Ip Domain Name System	Version 21.0.0
F5 Big Ip Edge Gateway	Version 21.0.0
F5 Big Ip Fraud Protection Service	Version 21.0.0
F5 Big Ip Global Traffic Manager	Version 21.0.0
F5 Big Ip Link Controller	Version 21.0.0
F5 Big Ip Local Traffic Manager	Version 21.0.0
F5 Big Ip Policy Enforcement Manager	Version 21.0.0
F5 Big Ip Ssl Orchestrator	Version 21.0.0
F5 Big Ip Webaccelerator	Version 21.0.0
F5 Big Ip Websafe	Version 21.0.0

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://my.f5.com/manage/s/article/K000160875

Source: f5sirt@f5.com

MitigationVendor Advisory

Timeline

No history available yet.