166 lines
8.9 KiB
JSON
166 lines
8.9 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-2022-49559",
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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": "2025-02-26T02:08:31.591Z",
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"datePublished": "2025-02-26T02:14:05.059Z",
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"dateUpdated": "2026-05-11T19:02:17.480Z"
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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": "2026-05-11T19:02:17.480Z"
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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: x86: Drop WARNs that assert a triple fault never \"escapes\" from L2\n\nRemove WARNs that sanity check that KVM never lets a triple fault for L2\nescape and incorrectly end up in L1. In normal operation, the sanity\ncheck is perfectly valid, but it incorrectly assumes that it's impossible\nfor userspace to induce KVM_REQ_TRIPLE_FAULT without bouncing through\nKVM_RUN (which guarantees kvm_check_nested_state() will see and handle\nthe triple fault).\n\nThe WARN can currently be triggered if userspace injects a machine check\nwhile L2 is active and CR4.MCE=0. And a future fix to allow save/restore\nof KVM_REQ_TRIPLE_FAULT, e.g. so that a synthesized triple fault isn't\nlost on migration, will make it trivially easy for userspace to trigger\nthe WARN.\n\nClearing KVM_REQ_TRIPLE_FAULT when forcibly leaving guest mode is\ntempting, but wrong, especially if/when the request is saved/restored,\ne.g. if userspace restores events (including a triple fault) and then\nrestores nested state (which may forcibly leave guest mode). Ignoring\nthe fact that KVM doesn't currently provide the necessary APIs, it's\nuserspace's responsibility to manage pending events during save/restore.\n\n ------------[ cut here ]------------\n WARNING: CPU: 7 PID: 1399 at arch/x86/kvm/vmx/nested.c:4522 nested_vmx_vmexit+0x7fe/0xd90 [kvm_intel]\n Modules linked in: kvm_intel kvm irqbypass\n CPU: 7 PID: 1399 Comm: state_test Not tainted 5.17.0-rc3+ #808\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:nested_vmx_vmexit+0x7fe/0xd90 [kvm_intel]\n Call Trace:\n <TASK>\n vmx_leave_nested+0x30/0x40 [kvm_intel]\n vmx_set_nested_state+0xca/0x3e0 [kvm_intel]\n kvm_arch_vcpu_ioctl+0xf49/0x13e0 [kvm]\n kvm_vcpu_ioctl+0x4b9/0x660 [kvm]\n __x64_sys_ioctl+0x83/0xb0\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n </TASK>\n ---[ end trace 0000000000000000 ]---"
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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/svm/nested.c",
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"arch/x86/kvm/vmx/nested.c"
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],
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"versions": [
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{
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"version": "cb6a32c2b8777ad31a02e585584d869251a790e3",
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"lessThan": "8d3a2aa0976f57320ba89baf9d57fb158dd0cd0d",
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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": "cb6a32c2b8777ad31a02e585584d869251a790e3",
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"lessThan": "f476a59d5c86c02a79eef893c6da86735f2977ac",
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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": "cb6a32c2b8777ad31a02e585584d869251a790e3",
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"lessThan": "7de373c9b48229e428ecdb8fbde269c5a8617fd2",
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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": "cb6a32c2b8777ad31a02e585584d869251a790e3",
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"lessThan": "45846661d10422ce9e22da21f8277540b29eca22",
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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/svm/nested.c",
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"arch/x86/kvm/vmx/nested.c"
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],
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"versions": [
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{
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"version": "5.13",
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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": "5.13",
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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": "5.15.45",
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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": "5.17.13",
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"lessThanOrEqual": "5.17.*",
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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": "5.18.2",
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"lessThanOrEqual": "5.18.*",
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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": "5.19",
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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": "5.13",
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"versionEndExcluding": "5.15.45"
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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": "5.13",
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"versionEndExcluding": "5.17.13"
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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": "5.13",
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"versionEndExcluding": "5.18.2"
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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": "5.13",
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"versionEndExcluding": "5.19"
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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/8d3a2aa0976f57320ba89baf9d57fb158dd0cd0d"
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},
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{
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"url": "https://git.kernel.org/stable/c/f476a59d5c86c02a79eef893c6da86735f2977ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/7de373c9b48229e428ecdb8fbde269c5a8617fd2"
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},
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{
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"url": "https://git.kernel.org/stable/c/45846661d10422ce9e22da21f8277540b29eca22"
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}
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],
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"title": "KVM: x86: Drop WARNs that assert a triple fault never \"escapes\" from L2",
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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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} |