CVE-2026-58374

Pre-authentication daemon crash via unchecked link ID

Published Jun 30, 2026 · Updated Jun 30, 2026

An out-of-bounds write in hostapd MLO association processing before 2.12 allows physically proximate attackers to crash the daemon. hostapd_process_ml_assoc_req() accepts the 4-bit link_id value 15 from a Per-STA Profile and writes through links[], whose valid indexes end at 14. The pre-authentication path requires AP mode, CONFIG_IEEE80211BE, and a Wi-Fi 7 MLD configuration; the confirmed consequence is process termination.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in hostapd MLO association processing before 2.12 allows physically proximate attackers to crash the daemon. hostapd_process_ml_assoc_req() accepts the 4-bit link_id value 15 from a Per-STA Profile and writes through links[], whose valid indexes end at 14. The pre-authentication path requires AP mode, CONFIG_IEEE80211BE, and a Wi-Fi 7 MLD configuration; the confirmed consequence is process termination.

The record

CVE
CVE-2026-58374
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
Jouni Malinen
Product
hostapd
Classifications
CWE-193, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.12

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Jouni Malinen · hostapdversion=0 <2.12

Published CVSS scores

7.1NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
6.5MITRECVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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