Answer in brief
CVE-2026-64562 records a Unknown severity vulnerability in KVM: nVMX: Hide shadow VMCS right after VMCLEAR. 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.
A CVSS score is not reported in the current record. 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 | >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <af56298e9d86e6098cd1d2e155cb2949b7c45412 || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <589419470030a89f16cf19300658b6dc644ca946 || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <8001d2ce9d9bd09118ce523aef595aa094573ae3 || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <1dabef6e206568bf9d9ade74f6e56a48ea35695d || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 | af56298e9d86e6098cd1d2e155cb2949b7c45412, 589419470030a89f16cf19300658b6dc644ca946, 8001d2ce9d9bd09118ce523aef595aa094573ae3, 1dabef6e206568bf9d9ade74f6e56a48ea35695d, 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR. The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64562 records a Unknown severity vulnerability in KVM: nVMX: Hide shadow VMCS right after VMCLEAR. 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.
A CVSS score is not reported in the current record. 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 | >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <af56298e9d86e6098cd1d2e155cb2949b7c45412 || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <589419470030a89f16cf19300658b6dc644ca946 || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <8001d2ce9d9bd09118ce523aef595aa094573ae3 || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <1dabef6e206568bf9d9ade74f6e56a48ea35695d || >=355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 <622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 | af56298e9d86e6098cd1d2e155cb2949b7c45412, 589419470030a89f16cf19300658b6dc644ca946, 8001d2ce9d9bd09118ce523aef595aa094573ae3, 1dabef6e206568bf9d9ade74f6e56a48ea35695d, 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR. The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.
Quoted source text, attributed separately from HOL analysis.