Bug 2536258 (CVE-2026-90372) - CVE-2026-90372 kernel: wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss
Summary: CVE-2026-90372 kernel: wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_...
Keywords:
Status: NEW
Alias: CVE-2026-90372
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 17:10 UTC by OSIDB Bzimport
Modified: 2026-10-20 10:56 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-17 17:10:32 UTC 
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.
Comment 1 gkamathe 2026-09-22 09:18:03 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90372.mbox
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