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In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: remove station if connection prep fails If connection preparation fails for MLO connections, then the interface is completely reset to non-MLD. In this case, we must not keep the station since it's related to the link of the vif being removed. Delete an existing station. Any "new_sta" is already being removed, so that doesn't need changes. This fixes a use-after-free/double-free in debugfs if that's enabled, because a vif going from MLD (and to MLD, but that's not relevant here) recreates its entire debugfs.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2026052816-CVE-2026-46125-b5d0@gregkh/T
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:26428 https://access.redhat.com/errata/RHSA-2026:26428
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:26427 https://access.redhat.com/errata/RHSA-2026:26427
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:26462 https://access.redhat.com/errata/RHSA-2026:26462
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:26515 https://access.redhat.com/errata/RHSA-2026:26515
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:26563 https://access.redhat.com/errata/RHSA-2026:26563
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:27288 https://access.redhat.com/errata/RHSA-2026:27288
This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:27731 https://access.redhat.com/errata/RHSA-2026:27731
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:27708 https://access.redhat.com/errata/RHSA-2026:27708
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Via RHSA-2026:27735 https://access.redhat.com/errata/RHSA-2026:27735
Attack Scenarios Attack Vector: - Access Required: Local access, primarily through debugfs interface (default path: /sys/kernel/debug/ieee80211/phy*/stations) - Privilege Level: Typically requires root access (debugfs default permissions) - Trigger Method: Reading debugfs files after forcing a failed MLO association Exploitation Impact: 1. Minimum Impact: Kernel panic causing denial of service 2. Maximum Impact: With heap grooming techniques, an attacker could overwrite a freed object with controlled data and hijack kernel execution flow, achieving privilege escalation to ring 0 (full kernel privileges)
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:27789 https://access.redhat.com/errata/RHSA-2026:27789