CVE-2026-90372

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.

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