{"id":"CVE-2022-49932","title":"KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= dbef2808af6c594922fe32833b30f55f35e9da6d < e136e969d268b9b89329c816c002e53f60e82985","Linux >= dbef2808af6c594922fe32833b30f55f35e9da6d < e28533c08023c4b319b7f2cd77f3f7c9204eb517","Linux >= dbef2808af6c594922fe32833b30f55f35e9da6d < e32b120071ea114efc0b4ddd439547750b85f618","Linux b2f7d0adc1260fa33ff3e992d18ff15873e68a67","Linux 2c0bf2560ca18abe1451db23b8ef8700c67cc44f","Linux f9971a898a815c2a6cce2932e91a576b28ed4cce","Linux 40888c31aca3a46f266f1f121679f8e1982df085","Linux cd3f438fbb9cb60da32dd2b665f7dc9baba1c4ad","Linux e35a2dc8c7f664ae8a9cc46d19985dc79bfc1083","Linux >= 4.9.220 < 4.10","Linux >= 4.14.177 < 4.15","Linux >= 4.19.116 < 4.20","Linux >= 5.4.33 < 5.5","Linux >= 5.5.18 < 5.6","Linux >= 5.6.5 < 5.7","Linux 5.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:51:38.282450Z"},"published":"2025-05-02","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:00:11.780Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49932","references":[{"url":"https://git.kernel.org/stable/c/e136e969d268b9b89329c816c002e53f60e82985"},{"url":"https://git.kernel.org/stable/c/e28533c08023c4b319b7f2cd77f3f7c9204eb517"},{"url":"https://git.kernel.org/stable/c/e32b120071ea114efc0b4ddd439547750b85f618"}],"tags":["cve.org"],"epss":0.00214,"epssPercentile":0.11868,"ingestedAt":"2026-11-05T22:38:31.628Z","slug":"CVE-2022-49932","body":"## Overview\n\nIn 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  <TASK>\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  </TASK>\n Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass\n\n## Affected\n\n- `Linux >= dbef2808af6c594922fe32833b30f55f35e9da6d < e136e969d268b9b89329c816c002e53f60e82985`\n- `Linux >= dbef2808af6c594922fe32833b30f55f35e9da6d < e28533c08023c4b319b7f2cd77f3f7c9204eb517`\n- `Linux >= dbef2808af6c594922fe32833b30f55f35e9da6d < e32b120071ea114efc0b4ddd439547750b85f618`\n- `Linux b2f7d0adc1260fa33ff3e992d18ff15873e68a67`\n- `Linux 2c0bf2560ca18abe1451db23b8ef8700c67cc44f`\n- `Linux f9971a898a815c2a6cce2932e91a576b28ed4cce`\n- `Linux 40888c31aca3a46f266f1f121679f8e1982df085`\n- `Linux cd3f438fbb9cb60da32dd2b665f7dc9baba1c4ad`\n- `Linux e35a2dc8c7f664ae8a9cc46d19985dc79bfc1083`\n- `Linux >= 4.9.220 < 4.10`\n- `Linux >= 4.14.177 < 4.15`\n- `Linux >= 4.19.116 < 4.20`\n- `Linux >= 5.4.33 < 5.5`\n- `Linux >= 5.5.18 < 5.6`\n- `Linux >= 5.6.5 < 5.7`\n- `Linux 5.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}