7.1

CVE-2026-58374: w1.fi hostapd Off-by-one Error

CVSS: 7.1v3.1HighAnalyzed
AliasesSUSE-SU-2026:22851-1SUSE-SU-2026:22931-1UBUNTU-CVE-2026-58374
Published 30-06-2026Last modified 30-06-2026
Open JSON

Vulnerability summary

CVE-2026-58374 is a high (CVSS 7.1) Off-by-one Error vulnerability in w1.fi hostapd. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.7% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
SUSE-SU-2026:23072-1SUSE-SU-2026:3103-1

Timeline

  1. 30-06-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

0.00 pp

From 0.29% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Opensuse4 products
  • hostapd&distro=openSUSE Leap 16.0< 2.11-bp160.3.1
  • hostapd&distro=openSUSE Tumbleweed< 2.11-4.1
  • wpa_supplicant&distro=openSUSE Leap 16.0< 2.11-160000.4.1
  • wpa_supplicant&distro=openSUSE Tumbleweed< 2.11-7.1
Redhat3 products
  • hostapd< 0:2.11-3.el10_2 | < 0:2.11-3.el9_8
  • hostapd-debuginfo< 0:2.11-3.el10_2 | < 0:2.11-3.el9_8
  • hostapd-debugsource< 0:2.11-3.el10_2 | < 0:2.11-3.el9_8
Suse3 products
  • wpa_supplicant&distro=SUSE Linux Enterprise Server 16.0< 2.11-160000.4.1
  • wpa_supplicant&distro=SUSE Linux Enterprise Server for SAP applications 16.0< 2.11-160000.4.1
  • wpa_supplicant&distro=SUSE Linux Micro 6.2< 2.11-160000.4.1
Debian1 product
  • wpaAll versions (No fix recorded)
Ubuntu1 product
  • wpaAll versions (No fix recorded)
W1.fi1 product

6 vendors · 13 products

References

21 links
Show all 21 references