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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Wi-Fi Alliance | hostapd with SAE support | 2.7 – ≤ 2.7 | — |
| Wi-Fi Alliance | wpa_supplicant with SAE support | 2.7 – ≤ 2.7 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | wpa | 2:2.7+git20190128+0c1e29f-4 | — |
| Debian 13 | wpa | 2:2.7+git20190128+0c1e29f-4 | — |
| Debian 12 | wpa | 2:2.7+git20190128+0c1e29f-4 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | hostapd | 2.9-bp151.5.3.1 | openSUSE-SU-2020:0222-1 |
| SUSE Package Hub 15 | hostapd | 2.9-bp151.5.3.1 | openSUSE-SU-2020:0222-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | hostapd | 2.9-6.2 | openSUSE-SU-2024:10846-1 |
| openSUSE Leap 15.1 | hostapd | 2.9-bp151.5.3.1 | openSUSE-SU-2020:0222-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | hostapd | 2.8-r0 | — |
| Alpine v3.23 | hostapd | 2.8-r0 | — |
| Alpine v3.22 | hostapd | 2.8-r0 | — |
| Alpine v3.21 | hostapd | 2.8-r0 | — |
| Alpine v3.20 | hostapd | 2.8-r0 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | hostapd | 2.8-r0 | — |
| Alpine v3.18 | hostapd | 2.8-r0 | — |
| Alpine v3.17 | hostapd | 2.8-r0 | — |
| Alpine v3.16 | hostapd | 2.8-r0 | — |
| Alpine v3.15 | hostapd | 2.8-r0 | — |
| Alpine v3.14 | hostapd | 2.8-r0 | — |
| Alpine v3.13 | hostapd | 2.8-r0 | — |
| Alpine v3.12 | hostapd | 2.8-r0 | — |
| Alpine v3.11 | hostapd | 2.8-r0 | — |
| Alpine v3.10 | hostapd | 2.8-r0 | — |
| Alpine v3.9 | hostapd | 2.7-r3 | — |
| Alpine v3.8 | hostapd | 2.6-r6 | — |
| Alpine v3.7 | hostapd | 2.6-r5 | — |
| Alpine v3.6 | hostapd | 2.6-r3 | — |
Advisories 2
- openSUSE-SU-2024:10846-1 hostapd-2.9-6.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0222-1 Security update for hostapd SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://w1.fi/security/2019-3/
- https://www.synology.com/security/advisory/Synology_SA_19_16
- FEDORA-2019-d03bae77f5 vendor-advisory
- FEDORA-2019-f409af9fbe vendor-advisory
- FEDORA-2019-eba1109acd vendor-advisory
- FreeBSD-SA-19:03 vendor-advisory
- 20190515 FreeBSD Security Advisory FreeBSD-SA-19:03.wpa mailing-list
- http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html
- openSUSE-SU-2020:0222 vendor-advisory