Race condition in Linux kernel - CVE-2026-90244

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

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.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/2af1e99ec14d226d66ceb9f16c663ee2568e6676
• https://git.kernel.org/stable/c/5a9e89ea34e0e34ac5d7e949042d665533549e40
• https://git.kernel.org/stable/c/e3c53e9173a47d5ce1fae020f2c6b1fb3c1123c2

• Race condition in Linux kernel iommu driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more