Is there a patch available for CVE-2026-64604?

Yes, a patch is available for CVE-2026-64604. Update the affected software to the latest version immediately.

Linux CVE-2026-64604

EUVD-2026-53790

2026-08-06 Linux

GHSA-m98c-vhm9-hw9c

Denial Of Service Linux Debian

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Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode

When updating CR8 intercepts, get vmcs12 if and only if the vCPU is in guest mode so that a future change can have update CR8 intercepts during vCPU creation, without running afoul of get_vmcs12()'s lockdep assertion.

------------[ cut here ]------------ debug_locks && !(lock_is_held(&(&vcpu->mutex)->dep_map) || !refcount_read(&vcpu->kvm->users_count)) WARNING: arch/x86/kvm/vmx/nested.h:61 at get_vmcs12 arch/x86/kvm/vmx/nested.h:60 [inline], CPU#0: syz.2.19/5879 WARNING: arch/x86/kvm/vmx/nested.h:61 at vmx_update_cr8_intercept+0x3de/0x4e0 arch/x86/kvm/vmx/vmx.c:6879, CPU#0: syz.2.19/5879 Modules linked in: CPU: 0 UID: 0 PID: 5879 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:get_vmcs12 arch/x86/kvm/vmx/nested.h:60 [inline] RIP: 0010:vmx_update_cr8_intercept+0x3de/0x4e0 arch/x86/kvm/vmx/vmx.c:6879 Call Trace: <TASK> apic_update_ppr arch/x86/kvm/lapic.c:984 [inline] kvm_lapic_reset+0x1c24/0x2980 arch/x86/kvm/lapic.c:3023 kvm_vcpu_reset+0x44c/0x1bf0 arch/x86/kvm/x86.c:12986 kvm_arch_vcpu_create+0x746/0x8b0 arch/x86/kvm/x86.c:12847 kvm_vm_ioctl_create_vcpu+0x428/0x930 virt/kvm/kvm_main.c:4201 kvm_vm_ioctl+0x893/0xd50 virt/kvm/kvm_main.c:5159 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK>

No functional change intended.

Affected VersionsENISA

Linux 0 <5.10.261

Linux patch: 7.2-rc1

Linux patch: 6.6.145

Linux 0 <7.1.4

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9a21f1defd96c6301c5fb462a78eb51b191bd2dd

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db8407b9fd06d857a4a5e8bcff1d086d13007711

Linux 0 <6.12.96

Linux patch: 7.1.4

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3dcfb04dd43b16fa1240fc6487fff578ad57264c

Linux patch: 6.12.96

Linux patch: 5.10.261

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ffaaff82336db84e9b58e7a3e81c2fd64e05ed7a

Linux patch: 6.1.178

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c7cd3605244c924249dea32632e1bc3e89bda543

Linux patch: 6.18.39

Linux 0 <5.15.212

Linux 0 <6.18.39

Linux patch: 5.15.212

Linux 0 <6.6.145

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <570af5db081b87374594a00711ac5760d2ea6844

Linux 0 <6.1.178

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7ef78d71ca713d8c00f7c34ddcf276c808143f77

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <258ec63c0f281bf7b50f9de67c8e93b5b7be5ed4

Affected Packages

microsoft azl3_kernel_0_6_6_145_2_1_azl3 no fix

euvd linux fix: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in microsoft, euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Lifecycle Timeline

Patch available

Aug 06, 2026 - 08:16 EUVD

CVE Published

Aug 06, 2026 - 07:13 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 94% exploitable

Vendor Action

See Below

Required. The vulnerability documented by this CVE requires customer action to resolve.

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.