Description
The implementations of SAE and EAP-pwd in hostapd and wpa_supplicant 2.x through 2.8 are vulnerable to side-channel attacks as a result of observable timing differences and cache access patterns when Brainpool curves are used. An attacker may be able to gain leaked information from a side-channel attack that can be used for full password recovery.
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 | 2:2.9-1 | — |
| Debian 13 | wpa | 2:2.9-1 | — |
| Debian 12 | wpa | 2:2.9-1 | — |
| Debian 10 | wpa | 2:2.7+git20190128+0c1e29f-6+deb10u1 | DSA-4538-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wpa | 2:2.6-15ubuntu2.4 | USN-4098-1 |
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 | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SLES 12 SP2 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| 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 | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SLES for SAP 12 SP3 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SLE HPC 15 | wpa_supplicant | 2.9-4.20.1 | SUSE-SU-2020:3380-1 |
| SUSE OpenStack Cloud Crowbar 9 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SUSE OpenStack Cloud Crowbar 8 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SUSE OpenStack Cloud 9 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SUSE OpenStack Cloud 8 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SUSE HPE Helion OpenStack 8 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | wpa_supplicant | 2.9-13.4 | openSUSE-SU-2024:11515-1 |
| 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 v3.10 | hostapd | 2.8-r1 | — |
| Alpine v3.10 | wpa_supplicant | 2.8-r2 | — |
| Alpine v3.9 | hostapd +1 | 2.7-r4 | — |
Advisories 8
- DSA-4538-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4098-1 wpa vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2022:1853-1 Security update for wpa_supplicant 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-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
References
- https://w1.fi/cgit/hostap/commit/?id=147bf7b88a9c231322b5b574263071ca6dbb0503
- https://w1.fi/cgit/hostap/commit/?id=cd803299ca485eb857e37c88f973fccfbb8600e5
- https://usn.ubuntu.com/4098-1/
- FEDORA-2019-97e9040197 vendor-advisory
- DSA-4538 vendor-advisory
- 20190929 [SECURITY] [DSA 4538-1] wpa security update mailing-list