Description
The eap_pwd_perform_confirm_exchange function in eap_peer/eap_pwd.c in wpa_supplicant 2.x before 2.6, when EAP-pwd is enabled in a network configuration profile, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an EAP-pwd Confirm message followed by the Identity exchange.
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 | 2.3-2.3 | — |
| Debian 13 | wpa | 2.3-2.3 | — |
| Debian 12 | wpa | 2.3-2.3 | — |
| Debian 8 | wpa | 2.3-1+deb8u3 | DSA-3397-1 |
| Debian 7 | wpa | 1.0-3+deb7u3 | DSA-3397-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | wpa_supplicant | 2.6-1.1 | openSUSE-SU-2024:10499-1 |
Advisories 2
- DSA-3397-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10499-1 wpa_supplicant-2.6-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-2808-1 vendor-advisory
- DSA-3397 vendor-advisory
- [oss-security] 20151110 wpa_supplicant: EAP-pwd peer error path failure on unexpected Confirm message mailing-list
- 77538 vdb-entry
- http://w1.fi/security/2015-8/eap-pwd-unexpected-confirm.txt