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Advisory severityHigh7.1Vendor: MediumRed Hat Linux

High [CVE-2026-58374] Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request

This high-severity Red Hat Linux advisory covers CVE-2026-58374 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 8.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-58374 Source published Source updated

VulniPulse record published Record updated

CVE-2026-58374
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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.

A flaw was found in hostapd. Red Hat severity: Moderate — CVSS 7.1 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H).

Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.

Red Hat fixing advisory: RHSA-2026:85276, RHSA-2026:85277.

Affected products named by the advisory: Red Hat package: hostapd.

Is CVE-2026-58374 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-58374 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-58374?

Upgrade to a fixed release named by Red Hat:

  • hostapd-0:2.11-3.el10_2
  • hostapd-0:2.11-3.el9_8
  • RHSA-2026:85276
  • RHSA-2026:85277

Confirm against the vendor advisory before you patch.

Affected versions
  • < 2.12

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Fixed versions
  • hostapd-0:2.11-3.el10_2
  • hostapd-0:2.11-3.el9_8
  • RHSA-2026:85276
  • RHSA-2026:85277

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Mitigation

Upgrade to a fixed release: hostapd-0:2.11-3.el10_2, hostapd-0:2.11-3.el9_8, RHSA-2026:85276, RHSA-2026:85277. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

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