{"id":"CVE-2022-48765","state":"PUBLISHED","title":"KVM: LAPIC: Also cancel preemption timer during SET_LAPIC","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: LAPIC: Also cancel preemption timer during SET_LAPIC\n\nThe below warning is splatting during guest reboot.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 0 PID: 1931 at arch/x86/kvm/x86.c:10322 kvm_arch_vcpu_ioctl_run+0x874/0x880 [kvm]\n  CPU: 0 PID: 1931 Comm: qemu-system-x86 Tainted: G          I       5.17.0-rc1+ #5\n  RIP: 0010:kvm_arch_vcpu_ioctl_run+0x874/0x880 [kvm]\n  Call Trace:\n   <TASK>\n   kvm_vcpu_ioctl+0x279/0x710 [kvm]\n   __x64_sys_ioctl+0x83/0xb0\n   do_syscall_64+0x3b/0xc0\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n  RIP: 0033:0x7fd39797350b\n\nThis can be triggered by not exposing tsc-deadline mode and doing a reboot in\nthe guest. The lapic_shutdown() function which is called in sys_reboot path\nwill not disarm the flying timer, it just masks LVTT. lapic_shutdown() clears\nAPIC state w/ LVT_MASKED and timer-mode bit is 0, this can trigger timer-mode\nswitch between tsc-deadline and oneshot/periodic, which can result in preemption\ntimer be cancelled in apic_update_lvtt(). However, We can't depend on this when\nnot exposing tsc-deadline mode and oneshot/periodic modes emulated by preemption\ntimer. Qemu will synchronise states around reset, let's cancel preemption timer\nunder KVM_SET_LAPIC.","publishedAt":"2024-06-20T11:13:41.830Z","updatedAt":"2026-05-11T18:46:30.146Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8003c9ae204e21204e49816c5ea629357e283b06","status":"affected","lessThan":"54b3439c8e70e0bcfea59aeef9dd98908cbbf655","versionType":"git"},{"version":"8003c9ae204e21204e49816c5ea629357e283b06","status":"affected","lessThan":"ce55f63f6cea4cab8ae9212f73285648a5baa30d","versionType":"git"},{"version":"8003c9ae204e21204e49816c5ea629357e283b06","status":"affected","lessThan":"35fe7cfbab2e81f1afb23fc4212210b1de6d9633","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/lapic.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.10","versionType":"semver"},{"version":"5.15.19","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.5","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/lapic.c"]}],"references":["https://git.kernel.org/stable/c/54b3439c8e70e0bcfea59aeef9dd98908cbbf655","https://git.kernel.org/stable/c/ce55f63f6cea4cab8ae9212f73285648a5baa30d","https://git.kernel.org/stable/c/35fe7cfbab2e81f1afb23fc4212210b1de6d9633"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48765.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48765","state":"PUBLISHED","datePublished":"2024-06-20T11:13:41.830Z","dateUpdated":"2026-05-11T18:46:30.146Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-06-20T11:09:39.060Z"},"containers":{"cna":{"title":"KVM: LAPIC: Also cancel preemption timer during SET_LAPIC","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: LAPIC: Also cancel preemption timer during SET_LAPIC\n\nThe below warning is splatting during guest reboot.\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 0 PID: 1931 at arch/x86/kvm/x86.c:10322 kvm_arch_vcpu_ioctl_run+0x874/0x880 [kvm]\n  CPU: 0 PID: 1931 Comm: qemu-system-x86 Tainted: G          I       5.17.0-rc1+ #5\n  RIP: 0010:kvm_arch_vcpu_ioctl_run+0x874/0x880 [kvm]\n  Call Trace:\n   <TASK>\n   kvm_vcpu_ioctl+0x279/0x710 [kvm]\n   __x64_sys_ioctl+0x83/0xb0\n   do_syscall_64+0x3b/0xc0\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n  RIP: 0033:0x7fd39797350b\n\nThis can be triggered by not exposing tsc-deadline mode and doing a reboot in\nthe guest. The lapic_shutdown() function which is called in sys_reboot path\nwill not disarm the flying timer, it just masks LVTT. lapic_shutdown() clears\nAPIC state w/ LVT_MASKED and timer-mode bit is 0, this can trigger timer-mode\nswitch between tsc-deadline and oneshot/periodic, which can result in preemption\ntimer be cancelled in apic_update_lvtt(). However, We can't depend on this when\nnot exposing tsc-deadline mode and oneshot/periodic modes emulated by preemption\ntimer. Qemu will synchronise states around reset, let's cancel preemption timer\nunder KVM_SET_LAPIC."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8003c9ae204e21204e49816c5ea629357e283b06","status":"affected","lessThan":"54b3439c8e70e0bcfea59aeef9dd98908cbbf655","versionType":"git"},{"version":"8003c9ae204e21204e49816c5ea629357e283b06","status":"affected","lessThan":"ce55f63f6cea4cab8ae9212f73285648a5baa30d","versionType":"git"},{"version":"8003c9ae204e21204e49816c5ea629357e283b06","status":"affected","lessThan":"35fe7cfbab2e81f1afb23fc4212210b1de6d9633","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/lapic.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.10","versionType":"semver"},{"version":"5.15.19","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.5","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/lapic.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/54b3439c8e70e0bcfea59aeef9dd98908cbbf655"},{"url":"https://git.kernel.org/stable/c/ce55f63f6cea4cab8ae9212f73285648a5baa30d"},{"url":"https://git.kernel.org/stable/c/35fe7cfbab2e81f1afb23fc4212210b1de6d9633"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:46:30.146Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.15.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.16.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/54b3439c8e70e0bcfea59aeef9dd98908cbbf655","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/ce55f63f6cea4cab8ae9212f73285648a5baa30d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/35fe7cfbab2e81f1afb23fc4212210b1de6d9633","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T15:25:00.534Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2022-48765","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:10:12.992201Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:34:47.369Z"}}]}}}