Race condition in Linux kernel - CVE-2026-45944
Published: May 28, 2026
Vulnerability identifier: #VU132549
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45944
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to a race condition in the Intel VT-d IOMMU context entry teardown logic when tearing down context entries. A local attacker can trigger use of a torn context entry to cause a denial of service.
The issue arises because the hardware may observe a partially updated 128-bit context entry while the Present bit remains set, resulting in unpredictable behavior or spurious faults.
How to mitigate CVE-2026-45944
Install security update from vendor's repository.