CVE-2026-90332 Linux Kernel - Denial of Service

Linux kernel contains a PCI MSI write flushing issue caused by missing flush of posted MSI writes before unmapping iATU entries in dwc endpoint driver, letting attackers cause MSI write loss or misrouting, exploit requires hardware interaction with MSI and iATU mappings.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.27% 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:C/C:N/I:L/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

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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