187 lines
9.6 KiB
JSON
187 lines
9.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-53756",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-08T01:18:04.280Z",
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"datePublished": "2025-12-08T01:19:17.081Z",
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"dateUpdated": "2026-05-11T19:51:04.572Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T19:51:04.572Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: VMX: Fix crash due to uninitialized current_vmcs\n\nKVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as\na nested hypervisor on top of Hyper-V. When MSR bitmap is updated,\nevmcs_touch_msr_bitmap function uses current_vmcs per-cpu variable to mark\nthat the msr bitmap was changed.\n\nvmx_vcpu_create() modifies the msr bitmap via vmx_disable_intercept_for_msr\n-> vmx_msr_bitmap_l01_changed which in the end calls this function. The\nfunction checks for current_vmcs if it is null but the check is\ninsufficient because current_vmcs is not initialized. Because of this, the\ncode might incorrectly write to the structure pointed by current_vmcs value\nleft by another task. Preemption is not disabled, the current task can be\npreempted and moved to another CPU while current_vmcs is accessed multiple\ntimes from evmcs_touch_msr_bitmap() which leads to crash.\n\nThe manipulation of MSR bitmaps by callers happens only for vmcs01 so the\nsolution is to use vmx->vmcs01.vmcs instead of current_vmcs.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000338\n PGD 4e1775067 P4D 0\n Oops: 0002 [#1] PREEMPT SMP NOPTI\n ...\n RIP: 0010:vmx_msr_bitmap_l01_changed+0x39/0x50 [kvm_intel]\n ...\n Call Trace:\n vmx_disable_intercept_for_msr+0x36/0x260 [kvm_intel]\n vmx_vcpu_create+0xe6/0x540 [kvm_intel]\n kvm_arch_vcpu_create+0x1d1/0x2e0 [kvm]\n kvm_vm_ioctl_create_vcpu+0x178/0x430 [kvm]\n kvm_vm_ioctl+0x53f/0x790 [kvm]\n __x64_sys_ioctl+0x8a/0xc0\n do_syscall_64+0x5c/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/x86/kvm/vmx/hyperv.h",
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"arch/x86/kvm/vmx/vmx.c"
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],
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"versions": [
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{
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"version": "ceef7d10dfb6284d512c499292e6daa35ea83f90",
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"lessThan": "6baebcecf09acd19e2bab1c2911dcdba5d48a1dc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ceef7d10dfb6284d512c499292e6daa35ea83f90",
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"lessThan": "6e7bc50f97c9855da83f1478f722590defd45ff2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ceef7d10dfb6284d512c499292e6daa35ea83f90",
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"lessThan": "b2de2b4d4e007f9add46ea8dc06f781835e3ea9f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ceef7d10dfb6284d512c499292e6daa35ea83f90",
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"lessThan": "3ba95cc671c025d0d2a1c7d5e2930f0ff0980cf4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ceef7d10dfb6284d512c499292e6daa35ea83f90",
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"lessThan": "93827a0a36396f2fd6368a54a020f420c8916e9b",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/x86/kvm/vmx/hyperv.h",
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"arch/x86/kvm/vmx/vmx.c"
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],
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"versions": [
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{
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"version": "4.18",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.18",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.175",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.103",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.16",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.2.3",
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"lessThanOrEqual": "6.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.18",
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"versionEndExcluding": "5.10.175"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.18",
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"versionEndExcluding": "5.15.103"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.18",
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"versionEndExcluding": "6.1.16"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.18",
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"versionEndExcluding": "6.2.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.18",
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"versionEndExcluding": "6.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6baebcecf09acd19e2bab1c2911dcdba5d48a1dc"
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},
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{
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"url": "https://git.kernel.org/stable/c/6e7bc50f97c9855da83f1478f722590defd45ff2"
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},
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{
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"url": "https://git.kernel.org/stable/c/b2de2b4d4e007f9add46ea8dc06f781835e3ea9f"
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},
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{
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"url": "https://git.kernel.org/stable/c/3ba95cc671c025d0d2a1c7d5e2930f0ff0980cf4"
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},
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{
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"url": "https://git.kernel.org/stable/c/93827a0a36396f2fd6368a54a020f420c8916e9b"
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}
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],
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"title": "KVM: VMX: Fix crash due to uninitialized current_vmcs",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |