Description
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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Wi-Fi Alliance | hostapd with EAP-pwd support | 2.7 – ≤ 2.7 | — |
| Wi-Fi Alliance | wpa_supplicant with EAP-pwd 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 | — |
| Debian 9 | wpa | 2:2.4-1+deb9u3 | DSA-4430-1 |
| Debian 8 | wpa | 2.3-1+deb8u8 | DLA-1867-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wpa | 2:2.6-15ubuntu2.2 | USN-3944-1 |
| Ubuntu 16.04 LTS | wpa | 2.4-0ubuntu6.4 | USN-3944-1 |
| Ubuntu 14.04 LTS | wpa | 2.1-0ubuntu1.7 | USN-3944-1 |
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 14 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 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 |
| 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 | 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 | wpa_supplicant | 2.9-lp152.8.3.1 | openSUSE-SU-2020:2059-1 |
| openSUSE Leap 15.1 | hostapd | 2.9-bp151.5.3.1 | openSUSE-SU-2020:0222-1 |
| 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 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.23 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.22 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.21 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.20 | wpa_supplicant | 2.7-r2 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.18 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.17 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.16 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.15 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.14 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.13 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.12 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.11 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.10 | wpa_supplicant | 2.7-r2 | — |
| Alpine v3.9 | wpa_supplicant | 2.7-r2 | — |
Advisories 12
- NCSC-2026-0229 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jul 14, 2026
- DSA-4430-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1867-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3944-1 wpa vulnerabilities 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-2024:10846-1 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
- openSUSE-SU-2020:0222-1 Security update for hostapd 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/security/2019-2/
- 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
- [debian-lts-announce] 20190731 [SECURITY] [DLA 1867-1] wpa security update mailing-list
- openSUSE-SU-2020:0222 vendor-advisory