CVE-2019-9495: Debian Linux

Low severity, CVSS 3.7. EPSS: 3.5% chance of exploitation in the next 30 days.

The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.

Affected products

• Debian Debian Linux: version 8.0 only
• Fedoraproject Fedora: version 28 only; version 29 only; version 30 only
• Freebsd Freebsd: version 11.2 only; version 12.0 only
• Opensuse Backports Sle: version 15.0 only
• Opensuse Leap: version 15.1 only
• Synology Radius Server: version 3.0 only
• Synology Router Manager: before 1.2.3-8017 (fixed in 1.2.3-8017)
• w1.fi Hostapd: up to and including 2.7
• w1.fi Wpa Supplicant: up to and including 2.7

Published 2019-04-17. Last modified 2026-06-17.