{"id":"CVE-2022-49932","summary":"KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace\n\nCall kvm_init() only after _all_ setup is complete, as kvm_init() exposes\n/dev/kvm to userspace and thus allows userspace to create VMs (and call\nother ioctls).  E.g. KVM will encounter a NULL pointer when attempting to\nadd a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to\ncreate a VM before vmx_init() configures said list.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] SMP\n CPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel]\n  \u003cTASK\u003e\n  vmx_vcpu_load+0x16/0x60 [kvm_intel]\n  kvm_arch_vcpu_load+0x32/0x1f0 [kvm]\n  vcpu_load+0x2f/0x40 [kvm]\n  kvm_arch_vcpu_create+0x231/0x310 [kvm]\n  kvm_vm_ioctl+0x79f/0xe10 [kvm]\n  ? handle_mm_fault+0xb1/0x220\n  __x64_sys_ioctl+0x80/0xb0\n  do_syscall_64+0x2b/0x50\n  entry_SYSCALL_64_after_hwframe+0x46/0xb0\n RIP: 0033:0x7f5a6b05743b\n  \u003c/TASK\u003e\n Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass","modified":"2026-04-02T08:28:04.349846Z","published":"2025-05-02T15:54:53.215Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49932.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/e136e969d268b9b89329c816c002e53f60e82985"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e28533c08023c4b319b7f2cd77f3f7c9204eb517"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e32b120071ea114efc0b4ddd439547750b85f618"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49932.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49932"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dbef2808af6c594922fe32833b30f55f35e9da6d"},{"fixed":"e136e969d268b9b89329c816c002e53f60e82985"},{"fixed":"e28533c08023c4b319b7f2cd77f3f7c9204eb517"},{"fixed":"e32b120071ea114efc0b4ddd439547750b85f618"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"b2f7d0adc1260fa33ff3e992d18ff15873e68a67"},{"last_affected":"2c0bf2560ca18abe1451db23b8ef8700c67cc44f"},{"last_affected":"f9971a898a815c2a6cce2932e91a576b28ed4cce"},{"last_affected":"40888c31aca3a46f266f1f121679f8e1982df085"},{"last_affected":"cd3f438fbb9cb60da32dd2b665f7dc9baba1c4ad"},{"last_affected":"e35a2dc8c7f664ae8a9cc46d19985dc79bfc1083"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49932.json"}}],"schema_version":"1.7.5"}