CVE-2026-90372
Published Sep 17, 2026
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.
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References
Other References
https://git.kernel.org/stable/c/25f753f7f620955a8a51e63e445d8b9076c51396
https://git.kernel.org/stable/c/2801477c36a19be4f549fe60e54995f03b0ea7b9
https://git.kernel.org/stable/c/38f4d6323bcd65e41a691432eddabd2b03acdeee
https://git.kernel.org/stable/c/4a2f4be532e3ea4e2b536e411793a05aaa51af25
https://git.kernel.org/stable/c/6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7
https://git.kernel.org/stable/c/85bd46ab7674b6d357f9a14791352c65fb09eee9
https://git.kernel.org/stable/c/e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6
https://git.kernel.org/stable/c/ecfd1a07e78c31d81322fb2d81dc468081cc3004
Frequently Asked Questions
What is CVE-2026-90372? +
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.
How do I check if I'm vulnerable to CVE-2026-90372? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.