Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace Call kvm_init() only after _all_ setup is complete, as kvm_init() exposes /dev/kvm to userspace and thus allows userspace to create VMs (and call other ioctls). E.g. KVM will encounter a NULL pointer when attempting to add a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to create a VM before vmx_init() configures said list. BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] SMP CPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel] <TASK> vmx_vcpu_load+0x16/0x60 [kvm_intel] kvm_arch_vcpu_load+0x32/0x1f0 [kvm] vcpu_load+0x2f/0x40 [kvm] kvm_arch_vcpu_create+0x231/0x310 [kvm] kvm_vm_ioctl+0x79f/0xe10 [kvm] ? handle_mm_fault+0xb1/0x220 __x64_sys_ioctl+0x80/0xb0 do_syscall_64+0x2b/0x50 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f5a6b05743b </TASK> Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected dbef2808af6c594922fe32833b30f55f35e9da6d before e136e969d268b9b89329c816c002e53f60e82985; affected dbef2808af6c594922fe32833b30f55f35e9da6d before e28533c08023c4b319b7f2cd77f3f7c9204eb517; affected dbef2808af6c594922fe32833b30f55f35e9da6d before e32b120071ea114efc0b4ddd439547750b85f618; affected b2f7d0adc1260fa33ff3e992d18ff15873e68a67; affected 2c0bf2560ca18abe1451db23b8ef8700c67cc44f; affected f9971a898a815c2a6cce2932e91a576b28ed4cce; affected 40888c31aca3a46f266f1f121679f8e1982df085; affected cd3f438fbb9cb60da32dd2b665f7dc9baba1c4ad; affected e35a2dc8c7f664ae8a9cc46d19985dc79bfc1083; affected 4.9.220 before 4.10; affected 4.14.177 before 4.15; affected 4.19.116 before 4.20; affected 5.4.33 before 5.5; affected 5.5.18 before 5.6; affected 5.6.5 before 5.7 |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 6.1.20 through 6.1.*; unaffected 6.2.7 through 6.2.*; unaffected 6.3 through * |
CWE
No CWE identifiers supplied.