CVE-2021-27803

Name: CVE-2021-27803
Creator: NVD / NIST
Published: 2021-02-26T23:15:11.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2021-27803 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
W1.Fi	Wpa Supplicant	>= 1.0, < 2.10
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

http://www.openwall.com/lists/oss-security/2021/02/27/1Mailing List, Mitigation, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00003.htmlMailing List, Third Party Advisory
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.patchPatch, Vendor Advisory
https://w1.fi/security/2021-1/wpa_supplicant-p2p-provision-discovery-processing-vulnerability.txtMitigation, Vendor Advisory
https://www.debian.org/security/2021/dsa-4898Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/25/3Mailing List, Mitigation, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/27/1Mailing List, Mitigation, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00003.htmlMailing List, Third Party Advisory
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.patchPatch, Vendor Advisory
https://w1.fi/security/2021-1/wpa_supplicant-p2p-provision-discovery-processing-vulnerability.txtMitigation, Vendor Advisory
https://www.debian.org/security/2021/dsa-4898Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/25/3Mailing List, Mitigation, Third Party Advisory

Timeline

Published: Feb 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27803?

How severe is CVE-2021-27803?

CVE-2021-27803 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27803?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27803?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST