CVE-2026-64562
KVM: nVMX: Hide shadow VMCS right after VMCLEAR
Description
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.
INFO
Published Date :
Aug. 4, 2026, 7:16 a.m.
Last Modified :
Aug. 4, 2026, 7:16 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64562
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to the latest version.
- Apply the patch for KVM: nVMX: Hide shadow VMCS right after VMCLEAR.
- Ensure VMCS operations are properly synchronized.
- Test thoroughly after applying the fix.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64562.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64562 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64562
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64562 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64562 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '355f4fb1405ec29d0fac49b4d41fcd78cbd455d5', 'lessThan': 'af56298e9d86e6098cd1d2e155cb2949b7c45412', 'versionType': 'git'}, {'status': 'affected', 'version': '355f4fb1405ec29d0fac49b4d41fcd78cbd455d5', 'lessThan': '589419470030a89f16cf19300658b6dc644ca946', 'versionType': 'git'}, {'status': 'affected', 'version': '355f4fb1405ec29d0fac49b4d41fcd78cbd455d5', 'lessThan': '8001d2ce9d9bd09118ce523aef595aa094573ae3', 'versionType': 'git'}, {'status': 'affected', 'version': '355f4fb1405ec29d0fac49b4d41fcd78cbd455d5', 'lessThan': '1dabef6e206568bf9d9ade74f6e56a48ea35695d', 'versionType': 'git'}, {'status': 'affected', 'version': '355f4fb1405ec29d0fac49b4d41fcd78cbd455d5', 'lessThan': '622ebfac01ba4f9c0060cebd41257fe46fc4a0b3', 'versionType': 'git'}], 'programFiles': ['arch/x86/kvm/vmx/nested.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/x86/kvm/vmx/nested.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d Added Reference https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946 Added Reference https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 Added Reference https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3 Added Reference https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412