CVE-2026-90372

wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss

State: Published
Severity: 7.1 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	89029a85482cbcf68026a89fc974e8f6898d6b37 to before 2801477c36a19be4f549fe60e54995f03b0ea7b9Affected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before 38f4d6323bcd65e41a691432eddabd2b03acdeeeAffected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before 25f753f7f620955a8a51e63e445d8b9076c51396Affected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6Affected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before 85bd46ab7674b6d357f9a14791352c65fb09eee9Affected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7Affected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before ecfd1a07e78c31d81322fb2d81dc468081cc3004Affected 89029a85482cbcf68026a89fc974e8f6898d6b37 to before 4a2f4be532e3ea4e2b536e411793a05aaa51af25Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

89029a85482cbcf68026a89fc974e8f6898d6b37 to before 2801477c36a19be4f549fe60e54995f03b0ea7b9Affected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before 38f4d6323bcd65e41a691432eddabd2b03acdeeeAffected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before 25f753f7f620955a8a51e63e445d8b9076c51396Affected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6Affected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before 85bd46ab7674b6d357f9a14791352c65fb09eee9Affected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7Affected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before ecfd1a07e78c31d81322fb2d81dc468081cc3004Affected
89029a85482cbcf68026a89fc974e8f6898d6b37 to before 4a2f4be532e3ea4e2b536e411793a05aaa51af25Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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