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7.1
HIGH CVSS 3.1
CVE-2026-58374
hostapd: Out-of-bounds Write in AP-mode Wi-Fi 7 MLO Association Request Processing
Overview
Description

In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containing a malformed Multi-Link Element or Per-STA Profile subelement. In hostapd_process_ml_assoc_req() in src/ap/ieee802_11_eht.c, the received link_id field can be parsed as value 15, but the corresponding links[] storage only has valid entries for lower link IDs (0 through 14). This causes an out-of-bounds write / small memory corruption during association processing before the 4-way handshake. The attack does not require network credentials, prior authentication, or user interaction. The confirmed practical impact is denial of service through hostapd process termination. This affects hostapd v2.11 and newer development snapshots before v2.12 when built with CONFIG_IEEE80211BE enabled. The issue is fixed in hostapd v2.12 and the upstream 2026-1 fixes.

Details
INFO

Published Date :

June 30, 2026, 1:19 p.m.

Last Modified :

July 2, 2026, 5:16 p.m.

Remotely Exploit :

No

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-58374 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 W1.fi hostapd
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 MEDIUM 8254265b-2729-46b6-b9e3-3dfca2d5bfca
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
Solution
Update hostapd to version 2.12 or later to fix memory corruption and denial of service vulnerabilities.
  • Update hostapd to version 2.12 or later.
  • Apply upstream fixes for hostapd.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-58374.

URL Resource
https://git.w1.fi/cgit/hostap/commit/?id=46dd5a4ffc9bcf44cf8fc45120b3e1e5ec922187 Patch
https://git.w1.fi/cgit/hostap/commit/?id=aa9d345887389a251c63a3781d2ad2940d079193 Patch
https://w1.fi/security/2026-1/ Issue Tracking
https://w1.fi/security/2026-1/missing-ml-parsing-validation.txt Mitigation Third Party Advisory
https://www.openwall.com/lists/oss-security/2026/06/30/1 Mailing List Mitigation Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-58374 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-58374 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-58374 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-58374 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Reanalysis by [email protected]

    Jul. 02, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
  • Initial Analysis by [email protected]

    Jul. 01, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:* versions up to (including) 2.11
    Added Reference Type MITRE: https://git.w1.fi/cgit/hostap/commit/?id=46dd5a4ffc9bcf44cf8fc45120b3e1e5ec922187 Types: Patch
    Added Reference Type MITRE: https://git.w1.fi/cgit/hostap/commit/?id=aa9d345887389a251c63a3781d2ad2940d079193 Types: Patch
    Added Reference Type MITRE: https://w1.fi/security/2026-1/ Types: Issue Tracking
    Added Reference Type MITRE: https://w1.fi/security/2026-1/missing-ml-parsing-validation.txt Types: Mitigation, Third Party Advisory
    Added Reference Type MITRE: https://www.openwall.com/lists/oss-security/2026/06/30/1 Types: Mailing List, Mitigation, Patch
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jun. 30, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-58374', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-30T13:38:17.879838Z'}
  • New CVE Received by [email protected]

    Jun. 30, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'w1.fi', 'product': 'hostapd', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.12', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}]
    Added Description In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containing a malformed Multi-Link Element or Per-STA Profile subelement. In hostapd_process_ml_assoc_req() in src/ap/ieee802_11_eht.c, the received link_id field can be parsed as value 15, but the corresponding links[] storage only has valid entries for lower link IDs (0 through 14). This causes an out-of-bounds write / small memory corruption during association processing before the 4-way handshake. The attack does not require network credentials, prior authentication, or user interaction. The confirmed practical impact is denial of service through hostapd process termination. This affects hostapd v2.11 and newer development snapshots before v2.12 when built with CONFIG_IEEE80211BE enabled. The issue is fixed in hostapd v2.12 and the upstream 2026-1 fixes.
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-193
    Added Reference https://git.w1.fi/cgit/hostap/commit/?id=46dd5a4ffc9bcf44cf8fc45120b3e1e5ec922187
    Added Reference https://git.w1.fi/cgit/hostap/commit/?id=aa9d345887389a251c63a3781d2ad2940d079193
    Added Reference https://w1.fi/security/2026-1/
    Added Reference https://w1.fi/security/2026-1/missing-ml-parsing-validation.txt
    Added Reference https://www.openwall.com/lists/oss-security/2026/06/30/1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact