Description
hostapd before 2.10 and wpa_supplicant before 2.10 allow an incorrect indication of disconnection in certain situations because source address validation is mishandled. This is a denial of service that should have been prevented by PMF (aka management frame protection). The attacker must send a crafted 802.11 frame from a location that is within the 802.11 communications range.
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 | 2:2.9-2 | — |
| Debian 13 | wpa | 2:2.9-2 | — |
| Debian 12 | wpa | 2:2.9-2 | — |
| Debian 10 | wpa | 2:2.7+git20190128+0c1e29f-6+deb10u1 | DSA-4538-1 |
| Debian 8 | wpa | 2.3-1+deb8u9 | DLA-1922-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wpa | 2:2.6-15ubuntu2.5 | USN-4136-1 |
| Ubuntu 16.04 LTS | wpa | 2.4-0ubuntu6.6 | USN-4136-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | wpa | 2.1-0ubuntu1.7+esm2 | USN-4136-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | wpa_supplicant | 2.9-4.20.1 | SUSE-SU-2020:3380-1 |
| SLES 15 SP1 | wpa_supplicant | 2.9-4.20.1 | SUSE-SU-2020:3380-1 |
| SLES 15 | wpa_supplicant | 2.9-4.20.1 | SUSE-SU-2020:3380-1 |
| SLES 12 SP5 | wpa_supplicant | 2.9-23.3.1 | SUSE-SU-2020:3424-1 |
| SLES 12 SP4 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SLES 12 SP2 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SLES for SAP 15 | wpa_supplicant | 2.9-4.20.1 | SUSE-SU-2020:3380-1 |
| SLES for SAP 12 SP5 | wpa_supplicant | 2.9-23.3.1 | SUSE-SU-2020:3424-1 |
| SLES for SAP 12 SP4 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SLES for SAP 12 SP3 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SLES for SAP 12 SP2 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SLE HPC 15 | wpa_supplicant | 2.9-4.20.1 | SUSE-SU-2020:3380-1 |
| SUSE Package Hub 15 SP2 | hostapd | 2.9-bp152.2.3.1 | openSUSE-SU-2021:0545-1 |
| SUSE OpenStack Cloud Crowbar 9 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SUSE OpenStack Cloud Crowbar 8 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SUSE OpenStack Cloud 9 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SUSE OpenStack Cloud 8 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SUSE OpenStack Cloud 7 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
| SUSE HPE Helion OpenStack 8 | wpa_supplicant | 2.6-15.13.1 | SUSE-SU-2021:0478-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | hostapd | 2.9-6.2 | openSUSE-SU-2024:10846-1 |
| openSUSE Tumbleweed | wpa_supplicant | 2.9-13.4 | openSUSE-SU-2024:11515-1 |
| openSUSE Leap 15.2 | hostapd | 2.9-lp152.2.3.1 | openSUSE-SU-2021:0519-1 |
| openSUSE Leap 15.2 | wpa_supplicant | 2.9-lp152.8.3.1 | openSUSE-SU-2020:2059-1 |
| openSUSE Leap 15.1 | wpa_supplicant | 2.9-lp151.5.10.1 | openSUSE-SU-2020:2053-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | hostapd | 2.9-r1 | — |
| Alpine v3.24 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.23 | hostapd | 2.9-r1 | — |
| Alpine v3.23 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.22 | hostapd | 2.9-r1 | — |
| Alpine v3.22 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.21 | hostapd | 2.9-r1 | — |
| Alpine v3.21 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.20 | hostapd | 2.9-r1 | — |
| Alpine v3.20 | wpa_supplicant | 2.9-r5 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | hostapd | 2.9-r1 | — |
| Alpine v3.19 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.18 | hostapd | 2.9-r1 | — |
| Alpine v3.18 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.17 | hostapd | 2.9-r1 | — |
| Alpine v3.17 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.16 | hostapd | 2.9-r1 | — |
| Alpine v3.16 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.15 | hostapd | 2.9-r1 | — |
| Alpine v3.15 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.14 | hostapd | 2.9-r1 | — |
| Alpine v3.14 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.13 | hostapd | 2.9-r1 | — |
| Alpine v3.13 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.12 | hostapd | 2.9-r1 | — |
| Alpine v3.12 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.11 | hostapd | 2.9-r1 | — |
| Alpine v3.11 | wpa_supplicant | 2.9-r5 | — |
| Alpine v3.10 | hostapd | 2.8-r2 | — |
| Alpine v3.10 | wpa_supplicant | 2.8-r3 | — |
| Alpine v3.9 | hostapd +1 | 2.7-r5 | — |
| Alpine v3.8 | hostapd | 2.6-r7 | — |
| Alpine v3.8 | wpa_supplicant | 2.6-r16 | — |
| Alpine v3.7 | hostapd | 2.6-r6 | — |
| Alpine v3.7 | wpa_supplicant | 2.6-r16 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | wpa_supplicant | 2.9-4 | — |
Advisories 13
- DSA-4538-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1922-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4136-1 wpa vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-4136-2 wpa, wpasupplicant vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10846-1 hostapd-2.9-6.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11515-1 wpa_supplicant-2.9-13.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3424-1 Security update for wpa_supplicant SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0545-1 Security update for hostapd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2053-1 Security update for wpa_supplicant SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3380-1 Security update for wpa_supplicant SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2059-1 Security update for wpa_supplicant SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0519-1 Security update for hostapd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0478-1 Security update for wpa_supplicant SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://www.openwall.com/lists/oss-security/2019/09/11/7
- https://w1.fi/security/2019-7/
- https://w1.fi/security/2019-7/ap-mode-pmf-disconnection-protection-bypass.txt
- [oss-security] 20190912 Re: hostapd/wpa_supplicant: AP mode PMF disconnection protection bypass mailing-list
- [debian-lts-announce] 20190916 [SECURITY] [DLA 1922-1] wpa security update mailing-list
- USN-4136-1 vendor-advisory
- USN-4136-2 vendor-advisory
- DSA-4538 vendor-advisory
- 20190929 [SECURITY] [DSA 4538-1] wpa security update mailing-list
- FEDORA-2019-0e0b28001d vendor-advisory
- FEDORA-2019-740834c559 vendor-advisory
- FEDORA-2019-2265b5ae86 vendor-advisory
- FEDORA-2019-65509aac53 vendor-advisory
- FEDORA-2019-2bdcccee3c vendor-advisory