# CVE-2021-27803: wpa_supplicant: The wpa_supplicant packages contain an 802.1X Supplicant with support for WEP, WPA, WPA2 (IEEE 802.11i / RSN), and va...

CVE-2021-27803 is fixed in 4 products on 1 platform, first by hostapd 2:2.6-15ubuntu2.8, released February 26, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-27803
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0123
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2021

## Description

The wpa_supplicant packages contain an 802.1X Supplicant with support for WEP, WPA, WPA2 (IEEE 802.11i / RSN), and various EAP authentication methods. They implement key negotiation with a WPA Authenticator for client stations and controls the roaming and IEEE 802.11 authentication and association of the WLAN driver.  Security Fix(es):  * wpa_supplicant: Use-after-free in P2P provision discovery processing (CVE-2021-27803)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | hostapd Ubuntu 18.04.6 LTS (bionic) | 2:2.6-15ubuntu2.8 | [hostapd 2:2.6-15ubuntu2.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-hostapd-2-2.6-15ubuntu2.8.md) | Feb 26, 2021 |
| Linux | hostapd Ubuntu 20.04 LTS (focal) | 2:2.9-1ubuntu4.3 | [hostapd 2:2.9-1ubuntu4.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-hostapd-2-2.9-1ubuntu4.3.md) | Feb 26, 2021 |
| Linux | wpa_supplicant RHEL 8 | 1:2.9-2.el8_3.1 | [RHSA-2021:0809](https://patchblox.com/security/data/fix/linux/rhsa-2021-0809.md) | Mar 11, 2021 |
| Linux | wpa_supplicant ol 8 | 1:2.9-2.el8_3.1 | [ELSA-2021-0809](https://patchblox.com/security/data/fix/linux/elsa-2021-0809.md) | Mar 11, 2021 |
| Linux | wpagui Ubuntu 18.04.6 LTS (bionic) | 2:2.6-15ubuntu2.8 | [wpagui 2:2.6-15ubuntu2.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wpagui-2-2.6-15ubuntu2.8.md) | Feb 26, 2021 |
| Linux | wpagui Ubuntu 20.04 LTS (focal) | 2:2.9-1ubuntu4.3 | [wpagui 2:2.9-1ubuntu4.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-wpagui-2-2.9-1ubuntu4.3.md) | Feb 26, 2021 |
| Linux | wpasupplicant Ubuntu 18.04.6 LTS (bionic) | 2:2.6-15ubuntu2.8 | [wpasupplicant 2:2.6-15ubuntu2.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wpasupplicant-2-2.6-15ubuntu2.8.md) | Feb 26, 2021 |
| Linux | wpasupplicant Ubuntu 20.04 LTS (focal) | 2:2.9-1ubuntu4.3 | [wpasupplicant 2:2.9-1ubuntu4.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-wpasupplicant-2-2.9-1ubuntu4.3.md) | Feb 26, 2021 |

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Data as of 2026-11-09T01:18:40Z 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

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