Description
The EAP-pwd peer implementation in hostapd and wpa_supplicant 1.0 through 2.4 does not clear the L (Length) and M (More) flags before determining if a response should be fragmented, which allows remote attackers to cause a denial of service (crash) via a crafted message.
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 | 2.3-2.2 | — |
| Debian 13 | wpa | 2.3-2.2 | — |
| Debian 12 | wpa | 2.3-2.2 | — |
| Debian 8 | wpa | 2.3-1+deb8u3 | DSA-3397-1 |
| Debian 7 | wpa | 1.0-3+deb7u3 | DSA-3397-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | wpa | 2.1-0ubuntu1.3 | USN-2650-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | wpa_supplicant | 2.6-1.1 | openSUSE-SU-2024:10499-1 |
Advisories 3
- DSA-3397-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2650-1 wpa, wpasupplicant vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:10499-1 wpa_supplicant-2.6-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [oss-security] 20150531 Re: CVE request: vulnerability in wpa_supplicant and hostapd mailing-list
- http://w1.fi/security/2015-4/0005-EAP-pwd-peer-Fix-asymmetric-fragmentation-behavior.patch
- DSA-3397 vendor-advisory
- GLSA-201606-17 vendor-advisory
- USN-2650-1 vendor-advisory
- http://w1.fi/security/2015-4/eap-pwd-missing-payload-length-validation.txt
- openSUSE-SU-2015:1030 vendor-advisory
- [oss-security] 20150509 Re: CVE request: vulnerability in wpa_supplicant and hostapd mailing-list