What’s Vulnerable › Vulnerabilities

CVE-2019-9502: Broadcom wl driver is vulnerable to heap buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-03 · updated 2026-06-17
• Weakness: CWE-122

Description

The Broadcom wl WiFi driver is vulnerable to a heap buffer overflow. If the vendor information element data length is larger than 164 bytes, a heap buffer overflow is triggered in wlc_wpa_plumb_gtk. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.

Affected products

• Broadcom Bcm4339 Firmware: all versions
• Synology Router Manager (SRM): 1.2

References

• https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html
• https://kb.cert.org/vuls/id/166939/
• https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html
• https://kb.cert.org/vuls/id/166939/

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