# CVE-2019-9495: hostapd: The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of ca...

CVE-2019-9495 is fixed in 3 products on 1 platform, first by hostapd 2:2.6-15ubuntu2.2, released April 10, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-9495
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0348
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 10, 2019

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | hostapd Ubuntu 18.04.6 LTS (bionic) | 2:2.6-15ubuntu2.2 | [hostapd 2:2.6-15ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-hostapd-2-2.6-15ubuntu2.2.md) | Apr 10, 2019 |
| Linux | wpagui Ubuntu 18.04.6 LTS (bionic) | 2:2.6-15ubuntu2.2 | [wpagui 2:2.6-15ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wpagui-2-2.6-15ubuntu2.2.md) | Apr 10, 2019 |
| Linux | wpasupplicant Ubuntu 18.04.6 LTS (bionic) | 2:2.6-15ubuntu2.2 | [wpasupplicant 2:2.6-15ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wpasupplicant-2-2.6-15ubuntu2.2.md) | Apr 10, 2019 |

---

Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.