CVE-2026-74409wifi: rtw89: add bounds check on firmware mac_id in link lookup
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 144c6cd24b3556e6e7a14271cee57a42ebf97450 before ad445de67359f24088d4305c05fbd7e34c4e35e3; from 144c6cd24b3556e6e7a14271cee57a42ebf97450 before 920101305e7601a33b9e01019f4ca526af2526ae; 144c6cd24b3556e6e7a14271cee57a42ebf97450 builds before 6d88244bb129755acca696f9227200f4a2d106a6 | CNA record |
References
- https://git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3
- https://git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae
- https://git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.