CVE-2026-90379 Linux Kernel mt76 - Denial of Service

Linux kernel mt76 mt7921 driver contains an invalid memory access vulnerability caused by unvalidated DMA queue index reads returning 0xFFFFFFFF during PCIe AER bus hang, letting attackers cause system crashes, exploit requires hardware bus hang condition.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.38% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for mt76 mt7921 PCIe AER handler support.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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