CVE-2021-27803

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-26 · updated 2026-06-17

Description

A vulnerability was discovered in how p2p/p2p_pd.c in wpa_supplicant before 2.10 processes P2P (Wi-Fi Direct) provision discovery requests. It could result in denial of service or other impact (potentially execution of arbitrary code), for an attacker within radio range.

Affected products

Debian Linux: 9.0, 10.0
Fedoraproject Fedora: 32, 33, 34
Canonical Ltd. wpa_supplicant: from 1.0 before 2.10 — fixed in 2.10

How to fix

Upgrade to a fixed version: Canonical Ltd. wpa_supplicant 2.10. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2021/02/27/1
https://lists.debian.org/debian-lts-announce/2021/03/msg00003.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZGUR5XFHATVXTRAEJMODS7ROYHA56NX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KOGP2VIVVXXQ6CZ2HU4DKGPDB4WR24XF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SEHS2CFGH3KCSNPHBHNGN5SGV6QPMLZ4/
https://w1.fi/security/2021-1/0001-P2P-Fix-a-corner-case-in-peer-addition-based-on-PD-R.patch
https://w1.fi/security/2021-1/wpa_supplicant-p2p-provision-discovery-processing-vulnerability.txt
https://www.debian.org/security/2021/dsa-4898
https://www.openwall.com/lists/oss-security/2021/02/25/3
http://www.openwall.com/lists/oss-security/2021/02/27/1
https://lists.debian.org/debian-lts-announce/2021/03/msg00003.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZGUR5XFHATVXTRAEJMODS7ROYHA56NX/

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