CVE-2026-58374

MEDIUM

W1.fi Hostapd < 2.12 - Off-by-one Error

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-58374. PoCs published by HermesNA-1.

AI-analyzed exploit summary This repository contains an auto-generated stub module for CVE-2026-58374, a missing bounds check in hostapd before 2.12 affecting Wi-Fi 7 MLO association request processing. The code includes metadata and references but lacks actual exploit implementation, serving only as a placeholder.

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.

Exploits (1)

github STUB 1 stars
by HermesNA-1 · pythonpoc
https://github.com/HermesNA-1/SnakeSploit/tree/main/data/modules_generated/cve-2026-58374_hostapd_before_212.py

This repository contains an auto-generated stub module for CVE-2026-58374, a missing bounds check in hostapd before 2.12 affecting Wi-Fi 7 MLO association request processing. The code includes metadata and references but lacks actual exploit implementation, serving only as a placeholder.

Classification
Stub 99%
Attack Type
Dos
Complexity
Moderate
Reliability
Theoretical
Target: hostapd before 2.12
No auth needed
Prerequisites: Unauthenticated attacker within wireless range of the target AP · Target running vulnerable hostapd version (before 2.12) with Wi-Fi 7 MLO enabled
mistral-large-3 · analyzed Jul 09, 2026 Full analysis →

References (5)

Core 5
Core References
Vendor Advisory vendor-advisory
hostap security advisory 2026-1: Missing multi-link parsing validation in wpa_supplicant and hostapd
https://w1.fi/security/2026-1/missing-ml-parsing-validation.txt
Vendor Advisory vendor-advisory patch
hostap security advisory 2026-1 patch directory
https://w1.fi/security/2026-1/
Patch patch
Fix commit 46dd5a4 - missing link ID bounds check
https://git.w1.fi/cgit/hostap/commit/?id=46dd5a4ffc9bcf44cf8fc45120b3e1e5ec922187
Patch patch
Fix commit aa9d345 - BSS bounds check for link_id
https://git.w1.fi/cgit/hostap/commit/?id=aa9d345887389a251c63a3781d2ad2940d079193

Scores

CVSS v3 6.5
EPSS 0.0029
EPSS Percentile 21.7%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-193
Status published
Products (2)
w1.fi/hostapd < 2.11
w1.fi/hostapd < 2.12
Published Jun 30, 2026
Tracked Since Jun 30, 2026