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Fencer Vulns
medium 6.5

CVE-2026-58374 json

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…

published 2026-06-30 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-40306

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

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.

Patch / fix

  • w1.fi hostapd 2.12
  • hostapd RHEL 10.2 2.11-3.el10_2
  • hostapd RHEL 9 2.11-3.el9_8

red hat advisories RHSA-2026:85276RHSA-2026:85277

  • wpa_supplicant Linux Micro 6.1 2.11-slfo.1.1_2.1
  • wpa_supplicant SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.11-160000.4.1
  • wpa_supplicant SLE Module for Basesystem 15 SP7 2.11-150700.3.3.1

suse advisories SUSE-SU-2026:23072-1SUSE-SU-2026:22851-1SUSE-SU-2026:22931-1SUSE-SU-2026:3103-1

  • wpa_supplicant openSUSE Leap 16.0 2.11-160000.4.1
  • hostapd openSUSE Leap 16.0 2.11-bp160.3.1
  • hostapd openSUSE Tumbleweed 2.11-4.1
  • wpa_supplicant openSUSE Tumbleweed 2.11-7.1

opensuse advisories openSUSE-SU-2026:21415-1openSUSE-SU-2026:21360-1openSUSE-SU-2026:11278-1openSUSE-SU-2026:11253-1

  • hostapd AlmaLinux 10 2.11-3.el10_2
  • hostapd AlmaLinux 9 2.11-3.el9_8

almalinux advisories ALSA-2026:85276ALSA-2026:85277

  • hostapd Rocky Linux 10 2.11-3.el10_2
  • hostapd Rocky Linux 9 2.11-3.el9_8

rocky linux advisories RLSA-2026:85276RLSA-2026:85277

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-58374 updated cvss 7.1

hostapd: hostapd: Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request

  • Red Hat Enterprise Linux 8 hostapd
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) hostapd 2.11-3.el9_8
    fixed: vendor fix RHSA-2026:85277
  • Red Hat Enterprise Linux AppStream (v. 10) hostapd 2.11-3.el10_2
    fixed: vendor fix RHSA-2026:85276

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected products

  • w1.fi hostapd

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.