Description
An issue was discovered in rsn_supp/wpa.c in wpa_supplicant 2.0 through 2.6. Under certain conditions, the integrity of EAPOL-Key messages is not checked, leading to a decryption oracle. An attacker within range of the Access Point and client can abuse the vulnerability to recover sensitive information.
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 | 2:2.6-18 | — |
| Debian 13 | wpa | 2:2.6-18 | — |
| Debian 12 | wpa | 2:2.6-18 | — |
| Debian 8 | wpa | 2.3-1+deb8u6 | DLA-1462-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wpa | 2:2.6-15ubuntu2.1 | USN-3745-1 |
| Ubuntu 16.04 LTS | wpa | 2.4-0ubuntu6.3 | USN-3745-1 |
| Ubuntu 14.04 LTS | wpa | 2.1-0ubuntu1.6 | USN-3745-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | wpa_supplicant | 1:2.6-12.el7 | RHSA-2018:3107 |
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 | 2.6-4.11.1 | SUSE-SU-2020:3380-1, SUSE-SU-2018:3480-1 |
| SLES 12 SP5 | wpa_supplicant | 2.9-23.3.1 | SUSE-SU-2020:3424-1 |
| SLES 12 SP4 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2022:1853-1, SUSE-SU-2019:1088-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2022:1853-1, SUSE-SU-2019:1088-1 |
| SLES 12 SP2 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2022:1853-1, SUSE-SU-2019:1088-1 |
| SLES 12 SP1 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2019:1088-1 |
| SLES 12 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2019:1088-1 |
| 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 | 2.6-15.10.1 | SUSE-SU-2022:1853-1, SUSE-SU-2019:1088-1 |
| SLES for SAP 12 SP3 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2022:1853-1, SUSE-SU-2019:1088-1 |
| SLES for SAP 12 SP2 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2019:1088-1 |
| 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 OpenStack Cloud 7 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2019:1088-1 |
| SUSE HPE Helion OpenStack 8 | wpa_supplicant | 2.9-15.22.1 | SUSE-SU-2022:1853-1 |
| SUSE Enterprise Storage 4 | wpa_supplicant | 2.6-15.10.1 | SUSE-SU-2019:1088-1 |
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 | 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 | 2.6-r14 | — |
| Alpine v3.23 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.22 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.21 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.20 | wpa_supplicant | 2.6-r14 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.18 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.17 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.16 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.15 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.14 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.13 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.12 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.11 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.10 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.9 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.8 | wpa_supplicant | 2.6-r14 | — |
| Alpine v3.7 | wpa_supplicant | 2.6-r9 | — |
| Alpine v3.6 | wpa_supplicant | 2.6-r5 | — |
| Alpine v3.5 | wpa_supplicant | 2.6-r3 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | wpa_supplicant | 1:2.6-12.amzn2 | ALAS2-2018-1122 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | wpa_supplicant | 1:2.6-12.el7 | ELSA-2018-3107 |
Advisories 15
- RHSA-2018:3107 Red Hat Security Advisory: wpa_supplicant security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-1462-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3745-1 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
- SUSE-SU-2019:1088-1 Security update for wpa_supplicant SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3480-1 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
- 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
- ICSA-19-344-01 Siemens SCALANCE W700 and W1700 CISA ICS & IT advisories · Dec 10, 2019
- ALAS2-2018-1122 Moderate: wpa_supplicant security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 8, 2018
- ELSA-2018-3107 Moderate: wpa_supplicant security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 5, 2018
References
- https://papers.mathyvanhoef.com/woot2018.pdf
- 1041438 vdb-entry
- https://w1.fi/security/2018-1/unauthenticated-eapol-key-decryption.txt
- FreeBSD-SA-18:11 vendor-advisory
- RHSA-2018:3107 vendor-advisory
- [debian-lts-announce] 20180809 [SECURITY] [DLA 1462-1] wpa security update mailing-list
- USN-3745-1 vendor-advisory
- openSUSE-SU-2019:1345 vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-344983.pdf
- https://www.us-cert.gov/ics/advisories/icsa-19-344-01