CVE-2026-74409

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtw89: add bounds check on firmware mac_id in link lookup

The mac_id field in RX descriptors is 8 bits wide (0-255), but assoc_link_on_macid[] has only RTW89_MAX_MAC_ID_NUM (128) entries. While the driver currently assigns mac_id values below 128, the descriptor value comes from firmware and is not validated before use as an array index. Add a defensive bounds check in rtw89_assoc_link_rcu_dereference() to guard against out-of-range firmware values.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux144c6cd24b3556e6e7a14271cee57a42ebf97450 < ad445de67359f24088d4305c05fbd7e34c4e35e3affected
LinuxLinux144c6cd24b3556e6e7a14271cee57a42ebf97450 < 920101305e7601a33b9e01019f4ca526af2526aeaffected
LinuxLinux144c6cd24b3556e6e7a14271cee57a42ebf97450 < 6d88244bb129755acca696f9227200f4a2d106a6affected
LinuxLinux6.14affected
LinuxLinux0 < 6.14unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References