CVE-2026-74409
wifi: rtw89: add bounds check on firmware mac_id in link lookup
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 15, 2026 |
| Last Updated | Aug 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
144c6cd24b3556e6e7a14271cee57a42ebf97450 < ad445de67359f24088d4305c05fbd7e34c4e35e3 144c6cd24b3556e6e7a14271cee57a42ebf97450 < 920101305e7601a33b9e01019f4ca526af2526ae 144c6cd24b3556e6e7a14271cee57a42ebf97450 < 6d88244bb129755acca696f9227200f4a2d106a6
Linux / Linux
6.14