Answer in brief
CVE-2026-64555 records a High severity (CVSS 8.8) vulnerability in KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=2de451a329cf662beeba71f63c7f83ee24ca6642 <10a568010e827108d149779908850afaec898846 || >=2de451a329cf662beeba71f63c7f83ee24ca6642 <884b44256041ec6b2dcbe8e6a67384d26145cba1 || >=2de451a329cf662beeba71f63c7f83ee24ca6642 <dd3b237eb7780d65eae296d3d3a70012b6e7a02f || >=2de451a329cf662beeba71f63c7f83ee24ca6642 <ff1022c3de46753eb7eba2f6efd990569e66ff95 | 10a568010e827108d149779908850afaec898846, 884b44256041ec6b2dcbe8e6a67384d26145cba1, dd3b237eb7780d65eae296d3d3a70012b6e7a02f, ff1022c3de46753eb7eba2f6efd990569e66ff95 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
Jul 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops() kvm_hyp_handle_mops() resets the single-step state machine as part of rewinding state for a MOPS exception by modifying vcpu_cpsr() and writing the result directly into hardware. In the case of nested virtualization, vcpu_cpsr() is a synthetic value such that the rest of KVM can deal with vEL2 cleanly. That means the value requires translation before being written into hardware, which is unfortunately missing from the MOPS handler. Fix it by directly modifying SPSR_EL2 and avoiding the synthetic state altogether, which will be resynchronized on the next 'full' exit back to KVM.
Quoted source text, attributed separately from HOL analysis.