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Vulnerabilities CVE-2026-74409

CVE-2026-74409

None
Open
TLP:CLEAR

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

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Description

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.

Details

Confidence
90%
Published
Aug 15, 2026
Last Modified
Aug 15, 2026
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