CVE-2026-58374

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.

hostapd is a user space daemon for access point and authentication servers. It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators and RADIUS authentication server. hostapd is designed to be a "daemon" program that runs in the back-ground and acts as the backend component controlling authentication. hostapd supports separate frontend programs and an example text-based frontend, hostapd_cli, is included with hostapd.

Security Fix(es):

• hostapd: hostapd: Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request (CVE-2026-58374)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

hostapd is a user space daemon for access point and authentication servers. It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators and RADIUS authentication server. hostapd is designed to be a "daemon" program that runs in the back-ground and acts as the backend component controlling authentication. hostapd supports separate frontend programs and an example text-based frontend, hostapd_cli, is included with hostapd.

Security Fix(es):

• hostapd: hostapd: Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request (CVE-2026-58374)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

hostapd is a user space daemon for access point and authentication servers. It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators and RADIUS authentication server. hostapd is designed to be a "daemon" program that runs in the back-ground and acts as the backend component controlling authentication. hostapd supports separate frontend programs and an example text-based frontend, hostapd_cli, is included with hostapd.

Security Fix(es):

• hostapd: hostapd: Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request (CVE-2026-58374)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

hostapd is a user space daemon for access point and authentication servers. It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators and RADIUS authentication server. hostapd is designed to be a "daemon" program that runs in the back-ground and acts as the backend component controlling authentication. hostapd supports separate frontend programs and an example text-based frontend, hostapd_cli, is included with hostapd.

Security Fix(es):

• hostapd: hostapd: Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request (CVE-2026-58374)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• CVE-2026-58374: reject invalid MLO Link ID (>= MAX_NUM_MLD_LINKS) in Per-STA Profile parsing to prevent an out-of-bounds write

These are all security issues fixed in the wpa_supplicant-2.11-7.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the hostapd-2.11-4.1 package on the GA media of openSUSE Tumbleweed.

This update for hostapd fixes the following issues:

Changes in hostapd:

• CVE-2026-58374: Missing multi-link parsing validation in wpa_supplicant and hostapd (bsc#1269892)

This update for wpa_supplicant fixes the following issues

• CVE-2026-58374: Fixed a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) MLO association request processing allows an unauthenticated user to send a crafted management frame and cause an out-of-bounds write (bsc#1269892).

This update for wpa_supplicant fixes the following issues

• CVE-2026-58374: Fixed a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) MLO association request processing allows an unauthenticated user to send a crafted management frame and cause an out-of-bounds write (bsc#1269892).

This update for wpa_supplicant fixes the following issues

• CVE-2026-58374: Fixed a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) MLO association request processing allows an unauthenticated user to send a crafted management frame and cause an out-of-bounds write (bsc#1269892).

This update for wpa_supplicant fixes the following issues:

Security issues fixed:

• CVE-2025-24912: RADIUS pending request dropping (bsc#1239461).
• CVE-2026-58374: missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) MLO association request processing allows an unauthenticated user to send a crafted management frame and cause an out-of-bounds write (bsc#1269892).
• Missing network context validation for PMKSA caching https://w1.fi/security/2026-2/.
• Unexpected SAE commit message contents terminating wpa_supplicant https://w1.fi/security/2026-3/.

Other updates and bugfixes:

• Revert "Mark authorization completed on driver indication during 4-way HS offload" because of WPA2-PSK/WPA-SAE connection problems with brcmfmac wifi hardware (bsc#1230797).

This update for wpa_supplicant fixes the following issues:

• CVE-2025-24912: hostapd RADIUS authentication of wi-fi devices allows a user in between the hostapd and the RADIUS server to inject crafted RADIUS packets and force RADIUS authentications to fail (bsc#1239461).
• CVE-2026-58374: missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) MLO association request processing allows an unauthenticated user to send a crafted management frame and cause an out-of-bounds write (bsc#1269892).
• Missing network context validation for PMKSA caching https://w1.fi/security/2026-2/
• Unexpected SAE commit message contents terminating wpa_supplicant https://w1.fi/security/2026-3/