Description
hostapd before 2.6 does not prevent use of the low-quality PRNG that is reached by an os_random() function call.
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 | 2:2.6-7 | — |
| Debian 13 | wpa | 2:2.6-7 | — |
| Debian 12 | wpa | 2:2.6-7 | — |
| Debian 8 | wpa | 2.3-1+deb8u7 | DLA-1733-1 |
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 |
Advisories 2
- DLA-1733-1 wpa - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3944-1 wpa vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- https://w1.fi/cgit/hostap/commit/?id=98a516eae8260e6fd5c48ddecf8d006285da7389
- [debian-lts-announce] 20190328 [SECURITY] [DLA 1733-1] wpa security update mailing-list
- USN-3944-1 vendor-advisory
- [oss-security] 20200227 Hostapd fails at seeding PRNGS, leading to insufficient entropy (CVE-2016-10743 and CVE-2019-10064) mailing-list
- [oss-security] 20200227 Re: Hostapd fails at seeding PRNGS, leading to insufficient entropy (CVE-2016-10743 and CVE-2019-10064) mailing-list
- 20200227 Hostapd fails at seeding PRNGS, leading to insufficient entropy (CVE-2016-10743 and CVE-2019-10064) mailing-list
- http://packetstormsecurity.com/files/156573/Hostapd-Insufficient-Entropy.html