wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90372
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:36 UTC
Updated2026-09-18 18:17:55 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 2801477c36a19be4f549fe60e54995f03b0ea7b9 git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 38f4d6323bcd65e41a691432eddabd2b03acdeee git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 25f753f7f620955a8a51e63e445d8b9076c51396 git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6 git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 85bd46ab7674b6d357f9a14791352c65fb09eee9 git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7 git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 ecfd1a07e78c31d81322fb2d81dc468081cc3004 git Not specified
CNA Linux Linux affected 89029a85482cbcf68026a89fc974e8f6898d6b37 4a2f4be532e3ea4e2b536e411793a05aaa51af25 git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/25f753f7f620955a8a51e63e445d8b9076c51396 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ecfd1a07e78c31d81322fb2d81dc468081cc3004 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/85bd46ab7674b6d357f9a14791352c65fb09eee9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2801477c36a19be4f549fe60e54995f03b0ea7b9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4a2f4be532e3ea4e2b536e411793a05aaa51af25 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/38f4d6323bcd65e41a691432eddabd2b03acdeee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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