kernel: KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM for arm64 systems. This issue arises when the system's Memory Management Unit MMU is inactive, causing an internal calculation for memory translation buffers TLB to misinterpret a negative value. This leads to an incorrect...

CVE-2026-89775

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation Computing the effects of a TLB invalidation involves looking at the size of the mapping cached by the TLB. For S1 mappings such as VNCR, this is deducted from...