SB20260720195 - Out-of-bounds read in Linux kernel mac80211

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64030)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in ieee80211_ml_epcs when processing an EPCS Enable Response action frame with a crafted PER_STA_PROFILE subelement containing link_id 15. A remote attacker can send a specially crafted action frame to cause a denial of service.

The unsolicited-notification path is reachable when EPCS is already enabled, and no prior client request is required when dialog_token is 0.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200
• https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2
• https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c