Improper control of a resource through its lifetime in Linux kernel - CVE-2026-45987
Published: May 28, 2026
Vulnerability identifier: #VU132496
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-2026-45987
CWE-ID: CWE-664
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 user to cause a denial of service.
The vulnerability exists due to improper state synchronization in nested SVM interrupt shadow handling when restoring nested virtual machine state. A local user can trigger restoration of nested state with KVM_SET_VCPU_EVENTS preceding KVM_SET_NESTED_STATE to cause a denial of service.
The issue affects L2 guests, where an incorrectly restored interrupt shadow can cause the vCPU to hang.
How to mitigate CVE-2026-45987
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/03bee264f8ebfd39e0254c98e112d033a7aa9055
- https://git.kernel.org/stable/c/1709418535a8df95532999d61b03d59975280258
- https://git.kernel.org/stable/c/2f950eeb27af6885416232761700b8820cae0a61
- https://git.kernel.org/stable/c/497f6af9679fc9c6ce2f438e11ed5d51b1aa8297
- https://git.kernel.org/stable/c/e0377e52f3c10ee572732d11b04625b7f517a862