New Linux Kernel Flaw Gives ARM64 KVM Guests Read-Write Access to Host Memory
A new flaw in the Linux kernel's KVM virtualization code for ARM64 processors can leave a freed piece of host memory exposed to a guest virtual machine on hosts with nested virtualization enabled. The bug, tracked as CVE-2026-89775, allows a guest to read and write host kernel memory, and the researcher who found it says it can be used to escape the guest and run code on the host machine.
What happened
A new flaw in the Linux kernel's KVM virtualization code for ARM64 processors can leave a freed piece of host memory exposed to a guest virtual machine on hosts with nested virtualization enabled. The bug, tracked as CVE-2026-89775, allows a guest to read and write host kernel memory, and the researcher who found it says it can be used to escape the guest and run code on the host machine.
Why it matters
The proceeding may create legal precedent, financial exposure or operating constraints for Regulation.
Affected entities
View evidence
1 reports · 1 original report · 1 independent
- The Hacker NewsPrimary source · Supports · EN · 100%New Linux Kernel Flaw Gives ARM64 KVM Guests Read-Write Access to Host Memory ↗
Claims
- New Linux Kernel Flaw Gives ARM64 KVM Guests Read-Write Access to Host Memory Observed
Conflicts
No material conflict detected in the available evidence.
Timeline
- First reported
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