Race condition in Linux kernel - CVE-2026-90244
Published: September 18, 2026
Vulnerability identifier: #VU151238
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-2026-90244
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to corrupt the msi_page_list.
The vulnerability exists due to a race condition in iommu_dma_get_msi_page() when guest drivers concurrently allocate MSIs for devices assigned through a VFIO type1 legacy container. A local user can trigger concurrent MSI allocations to corrupt the msi_page_list.
Exploitation requires a VFIO type1 legacy container that merges two devices from different IOMMU groups onto a shared domain.
Affected software
Linux kernel
How to mitigate CVE-2026-90244
Install security update from vendor's repository.