CVE-2019-9496: An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confi...

Description

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

Metrics

EPSS Probability

5.22%

91.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
W1.Fi	Hostapd	<= 2.7
W1.Fi	Wpa Supplicant	<= 2.7
Fedoraproject	Fedora	28
Fedoraproject	Fedora	29
Fedoraproject	Fedora	30

References

Timeline

Published: Apr 17, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9496?

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

How severe is CVE-2019-9496?

Severity scoring for CVE-2019-9496 is pending analysis. The EPSS model estimates a 5.22% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9496?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.