CVE-2026-68405

A flaw was found in the Linux kernel's mac80211 Wi-Fi subsystem. When stopping an Access Point (AP) VLAN, the system attempts to free network packet buffers (SKBs) while interrupts are disabled. This improper handling can lead to a situation where network transmission operations occur in an inappropriate context, potentially causing system instability or a denial of service.

This issue affects systems using mac80211 AP VLAN interfaces. When stopping an AP VLAN, bc_buf SKBs are freed via ieee80211_free_txskb() while holding the bc_buf lock with IRQs disabled, which can recurse into netlink transmit and deadlock. Systems not using mac80211 AP VLAN mode are not affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.