CVE-2021-27803: A vulnerability was discovered in how p2p/p2p_pd.c in wpa_supplicant before 2.10 processes P2P (Wi-Fi Direct) provision discovery requests.
Noroxi assessment
Priority: Monitor (action score 30/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.2% of all records.
- Someone on the same network segment can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: wpa_supplicant (Alpine:v3.10) 2.8-r5; wpa_supplicant (Alpine:v3.11) 2.9-r7; wpa_supplicant (Alpine:v3.13) 2.9-r10.
Low priority for now. Upgrade to wpa_supplicant (Alpine:v3.10) 2.8-r5; wpa_supplicant (Alpine:v3.11) 2.9-r7; wpa_supplicant (Alpine:v3.13) 2.9-r10 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Feb 26, 2021
- Updated
- Jun 16, 2026
- EPSS
- 1.2% · 69th percentile
- CWE
- —
Report tools
Action score
30
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| w1.fi | wpa supplicant | cpe:2.3:a:w1.fi:wpa_supplicant |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- debian debian linux9.0
- fedoraproject fedora32
- fedoraproject fedora33
- fedoraproject fedora34
- w1.fi wpa supplicant1.0 and later · before 2.10
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.10 | wpa_supplicant | from 1.0 · before 2.8-r5 | 2.8-r5 |
| Alpine:v3.11 | wpa_supplicant | from 1.0 · before 2.9-r7 | 2.9-r7 |
| Alpine:v3.13 | wpa_supplicant | from 1.0 · before 2.9-r10 | 2.9-r10 |
| Alpine:v3.14 | wpa_supplicant | from 1.0 · before 2.9-r12 | 2.9-r12 |
| Debian:10 | wpa | before 2:2.7+git20190128+0c1e29f-6+deb10u3 | 2:2.7+git20190128+0c1e29f-6+deb10u3 |
| Debian:12 | wpa | before 2:2.9.0-21 | 2:2.9.0-21 |
| Debian:9 | wpa | before 2:2.4-1+deb9u9 | 2:2.4-1+deb9u9 |
| openSUSE:Leap 15.2 | wpa_supplicant | before 2.9-lp152.8.9.1 | 2.9-lp152.8.9.1 |
| openSUSE:Tumbleweed | wpa_supplicant | before 2.9-13.4 | 2.9-13.4 |
| Red Hat:enterprise_linux:7::client | wpa_supplicant | before 1:2.6-12.el7_9.2 | 1:2.6-12.el7_9.2 |
| Red Hat:enterprise_linux:7::client | wpa_supplicant-debuginfo | before 1:2.6-12.el7_9.2 | 1:2.6-12.el7_9.2 |
| Red Hat:enterprise_linux:8::baseos | wpa_supplicant | before 1:2.9-2.el8_3.1 | 1:2.9-2.el8_3.1 |
| Red Hat:enterprise_linux:8::baseos | wpa_supplicant-debuginfo | before 1:2.9-2.el8_3.1 | 1:2.9-2.el8_3.1 |
| Red Hat:enterprise_linux:8::baseos | wpa_supplicant-debugsource | before 1:2.9-2.el8_3.1 | 1:2.9-2.el8_3.1 |
| Red Hat:rhel_eus:8.1::baseos | wpa_supplicant | before 1:2.7-2.el8_1.1 | 1:2.7-2.el8_1.1 |
| Red Hat:rhel_eus:8.1::baseos | wpa_supplicant-debuginfo | before 1:2.7-2.el8_1.1 | 1:2.7-2.el8_1.1 |
| Red Hat:rhel_eus:8.1::baseos | wpa_supplicant-debugsource | before 1:2.7-2.el8_1.1 | 1:2.7-2.el8_1.1 |
| Red Hat:rhel_eus:8.2::baseos | wpa_supplicant | before 1:2.9-2.el8_2.1 | 1:2.9-2.el8_2.1 |
| Red Hat:rhel_eus:8.2::baseos | wpa_supplicant-debuginfo | before 1:2.9-2.el8_2.1 | 1:2.9-2.el8_2.1 |
| Red Hat:rhel_eus:8.2::baseos | wpa_supplicant-debugsource | before 1:2.9-2.el8_2.1 | 1:2.9-2.el8_2.1 |
| SUSE:HPE Helion OpenStack 8 | wpa_supplicant | before 2.6-15.16.1 | 2.6-15.16.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP2 | wpa_supplicant | before 2.9-4.26.1 | 2.9-4.26.1 |
| SUSE:Linux Enterprise Server 12 SP5 | wpa_supplicant | before 2.9-23.9.2 | 2.9-23.9.2 |
Same product
w1.fi: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-5290An issue was discovered in Ubuntu wpa_supplicant that resulted in loading of arbitrary shared objects, which allows a local unprivileged…31Monitor
- CVE-2015-5316The eap_pwd_perform_confirm_exchange function in eap_peer/eap_pwd.c in wpa_supplicant 2.x before 2.6, when EAP-pwd is enabled in a network…24Monitor
- CVE-2015-5315The eap_pwd_process function in eap_peer/eap_pwd.c in wpa_supplicant 2.x before 2.6 does not validate that the reassembly buffer is large…24Monitor
Published before and after this one in the same product
- ← EarlierCVE-2015-8041Nov 9, 2015 · Multiple integer overflows in the NDEF record parser in hostapd before 2.5 and wpa_supplicant before 2.5 allow remote attackers to cause a…21Monitor
- ← EarlierCVE-2015-0210Aug 28, 2017 · wpa_supplicant 2.0-16 does not properly check certificate subject name, which allows remote attackers to cause a man-in-the-middle attack.23Monitor
- ← EarlierCVE-2015-5314Feb 21, 2018 · The eap_pwd_process function in eap_server/eap_server_pwd.c in hostapd 2.x before 2.6 does not validate that the reassembly buffer is large…24Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:wpa_supplicant | 2.8-r5 · Alpine:v3.10 | Package registry (OSV) |
| debian:wpa | 2:2.9.0-21 · Debian:12 | Package registry (OSV) |
| opensuse:wpa_supplicant | 2.9-lp152.8.9.1 · openSUSE:Leap 15.2 | Package registry (OSV) |
| red hat:wpa_supplicant | 1:2.6-12.el7_9.2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:wpa_supplicant-debuginfo | 1:2.6-12.el7_9.2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:wpa_supplicant-debugsource | 1:2.9-2.el8_3.1 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| suse:wpa_supplicant | 2.9-23.9.2 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Someone on the same network segment can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Adjacent
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (8 more)Show less
- lists.debian.org/debian-lts-announce/2021/03/msg00003.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZGUR5XFHATVXTRAEJMODS7ROYHA56NX/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KOGP2VIVVXXQ6CZ2HU4DKGPDB4WR24XF/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SEHS2CFGH3KCSNPHBHNGN5SGV6QPMLZ4/
- w1.fi/security/2021-1/0001-P2P-Fix-a-corner-case-in-peer-addition-based-on-PD-R.patch
- w1.fi/security/2021-1/wpa_supplicant-p2p-provision-discovery-processing-vulnerability.txt
- www.debian.org/security/2021/dsa-4898
- www.openwall.com/lists/oss-security/2021/02/25/3
Vendor advisories and official records. Exploit/PoC links are deliberately left out.