Race condition in Linux kernel - CVE-2026-90332
Published: September 18, 2026
Vulnerability identifier: #VU151153
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90332
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause MSI writes to be dropped or misrouted.
The vulnerability exists due to improper synchronization in MSI handling in dw_pcie_ep_raise_msi_irq() when remapping the MSI iATU entry after the Root Complex changes the cached MSI target address. A local user can trigger MSI interrupt handling to cause MSI writes to be dropped or misrouted.
Affected software
Linux kernel
How to mitigate CVE-2026-90332
Install security update from vendor's repository.