{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:11",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.262-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.180-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.96-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.4-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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 \u0026\u0026 !(lock_is_held(\u0026(\u0026vcpu-\u003emutex)-\u003edep_map) || !refcount_read(\u0026vcpu-\u003ekvm-\u003eusers_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:    \u003cTASK\u003e    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    \u003c/TASK\u003e  No functional change intended.",
  "id": "DEBIAN-CVE-2026-64604",
  "modified": "2026-08-07T11:47:33.633922123Z",
  "published": "2026-08-06T08:16:36.220Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64604"
    }
  ],
  "upstream": [
    "CVE-2026-64604"
  ]
}