CVE-2015-4638

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-09-18 · updated 2026-06-17
Weakness: CWE-20

Description

The FastL4 virtual server in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, GTM, Link Controller, and PEM 11.3.0 through 11.5.2 and 11.6.0 through 11.6.0 HF4, BIG-IP Edge Gateway, WebAccelerator, and WOM 11.2.1 through 11.3.0, and BIG-IP PSM 11.2.1 through 11.4.1 allows remote attackers to cause a denial of service (Traffic Management Microkernel restart) via a fragmented packet.

Affected products

BIG-IP: 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
F5 Big-Ip Analytics: 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
BIG-IP ASM: 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
F5 Big-Ip Edge Gateway: 11.2.1, 11.3.0
F5 Big-Ip Global Traffic Manager: 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
F5 Big-Ip Link Controller: 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
F5 BIG-IP (LTM): 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
F5 Networks, Inc. BIG-IP (PEM): 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+1)
F5 Big-Ip Protocol Security Module: 11.2.1, 11.3.0, 11.4.0, 11.4.1
F5 Big-Ip Webaccelerator: 11.2.1, 11.3.0

References

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