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.
Metrics
Affected Vendors & Products
References
History
Tue, 30 Jun 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
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| Title | Out‑of‑Bounds Write in hostapd Multi‑Link Operation Association Request Causes Denial of Service |
Tue, 30 Jun 2026 14:30:00 +0000
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| Metrics |
ssvc
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Tue, 30 Jun 2026 13:15:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| First Time appeared |
W1.fi
W1.fi hostapd |
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| Weaknesses | CWE-193 | |
| CPEs | cpe:2.3:a:w1.fi:hostapd:*:*:*:*:*:*:*:* | |
| Vendors & Products |
W1.fi
W1.fi hostapd |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-06-30T13:38:26.434Z
Reserved: 2026-06-30T12:35:53.986Z
Link: CVE-2026-58374
Updated: 2026-06-30T13:38:22.191Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-30T15:00:06Z