CVE-2026-90372 (CVSS 7.1)

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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CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS — Exploit Prediction

0.0036

Probability of exploitation

0.28%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-90372? +

CVE-2026-90372 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0036, placing it in the 0th percentile for exploitation probability.

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.

CVE-2026-90372