SB20260918340 - Race condition in Linux kernel controller dwc driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-90332)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1b01d725d8b42450b86a857bab3c46856c740166
• https://git.kernel.org/stable/c/914704c7b318bdaa42dce4e55f6c492190fee3b5