CVE-2026-90372
High
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss If a peer's VHT/HE MCS map has no supported spatial stream (all fields 0x3), the loop exits with nss == 0 and the function returned (u8)-1 (255), which was then written into the firmware sta_rec_bf beamforming fields. Clamp the result to 0.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Linux
PublishedSep 17, 2026
First seenSep 17, 2026
How to fix
Update
- Linux Linux2801477c36a19be4f549fe60e54995f03b0ea7b9, 38f4d6323bcd65e41a691432eddabd2b03acdeee, 25f753f7f620955a8a51e63e445d8b9076c51396, e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6, 85bd46ab7674b6d357f9a14791352c65fb09eee9, 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7, ecfd1a07e78c31d81322fb2d81dc468081cc3004, 4a2f4be532e3ea4e2b536e411793a05aaa51af25 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < 2801477c36a19be4f549fe60e54995f03b0ea7b9, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < 38f4d6323bcd65e41a691432eddabd2b03acdeee, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < 25f753f7f620955a8a51e63e445d8b9076c51396, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < 85bd46ab7674b6d357f9a14791352c65fb09eee9, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < ecfd1a07e78c31d81322fb2d81dc468081cc3004, 89029a85482cbcf68026a89fc974e8f6898d6b37 ≤ v < 4a2f4be532e3ea4e2b536e411793a05aaa51af25, 5.8 | 2801477c36a19be4f549fe60e54995f03b0ea7b9, 38f4d6323bcd65e41a691432eddabd2b03acdeee, 25f753f7f620955a8a51e63e445d8b9076c51396, e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6, 85bd46ab7674b6d357f9a14791352c65fb09eee9, 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7, ecfd1a07e78c31d81322fb2d81dc468081cc3004, 4a2f4be532e3ea4e2b536e411793a05aaa51af25 |
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