SB2026081696 - Improper control of a resource through its lifetime in Linux kernel kvm svm

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-72286)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.8 [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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper state management in KVM SEV/SNP intra-host migration and mirroring logic when migrating or mirroring SEV-SNP virtual machines. A local user can initiate migration or mirroring of a crafted SEV-SNP VM to cause a denial of service.

The issue affects SEV-SNP guests because required SNP-specific state and VMSA features are not fully transferred or initialized during intra-host migration or mirroring.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6ee4140788234a6fabf59e6a50e38cdb936008cd
• https://git.kernel.org/stable/c/b70404b89daad5f9f33f7ac640b1065cba639935
• https://git.kernel.org/stable/c/ba06690b28be950bd46d938d9b919c4024292627
• https://git.kernel.org/stable/c/d2f9df3b615ca0cd45899c090366945528186052