248 lines
13 KiB
JSON
248 lines
13 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-99176",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-09-25T10:25:14.399Z",
|
|
"datePublished": "2026-10-28T10:35:30.615Z",
|
|
"dateUpdated": "2026-10-30T12:42:40.156Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-10-30T12:42:40.156Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Reset MMU back to the root MMU if loading L2 state fails for !VM-Entry\n\nReset the vCPU's MMU pointer back to the root MMU if loading L2 state fails\nin the \"not from VM-Entry\" case, i.e. when emulating RSM or handling\nKVM_SET_NESTED_STATE. Failure to unwind the MMU pointer results in KVM\ntrying to run L1 with a nested MMU, and is especially problematic if the\nvCPU manages to free its nested state before the VM crashes. Constructing\nthe root for a nested EPT MMU goes through vmcs12, which is dynamically\nallocated/freed when nVMX is enabled/disabled. And so if the nested state\nis freed with the MMU still pointing at the nested MMU, KVM will hit a NULL\npointer deref when attempting to get L1=>L2 EPTP.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000078\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 114a2d067 P4D 111743067 PUD 11141f067 PMD 0\n Oops: Oops: 0000 [#1] SMP\n CPU: 20 UID: 1000 PID: 1272 Comm: nested_tdp_faul Not tainted 7.3.0-rc4-8c89f11d1a99b-sink-vm #1914 PREEMPTLAZY\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:nested_ept_get_eptp+0xb/0x10 [kvm_intel]\n Call Trace:\n <TASK>\n kvm_mmu_load+0xcd/0x870 [kvm]\n kvm_arch_vcpu_ioctl_run+0x18f5/0x1f80 [kvm]\n kvm_vcpu_ioctl+0x2c7/0x970 [kvm]\n __x64_sys_ioctl+0x90/0xd0\n do_syscall_64+0x9c/0x4d0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n RIP: 0033:0x47491b\n </TASK>\n Modules linked in: kvm_intel kvm irqbypass\n CR2: 0000000000000078\n ---[ end trace 0000000000000000 ]---\n RIP: 0010:nested_ept_get_eptp+0xb/0x10 [kvm_intel]\n\n[sean: write changelog]"
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"arch/x86/kvm/vmx/nested.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "c2586874605ec23b611c57fe71d183d98f168971",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "c611337aee17a0627e365e58e2b6e78803fb3c36",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "df4d01be5b318024bec68654c7af0ebc0e0ed8a1",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "6a36b05fc5b3d660fcc826133dc92e2fc87bd1de",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "f0c077c36fda9d498db39199e3997860e985efc8",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "d00d5f534a8238674755e59826a6c7d3c8efb870",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "c9716f956216eb74ab0aad7f633586edd49e0322",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778",
|
|
"lessThan": "c8f4cfe1cf93bce924e27f2abead7a4c4a487505",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"arch/x86/kvm/vmx/nested.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "4.15",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "4.15",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.273",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.224",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.191",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.161",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.115",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.59",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2.13",
|
|
"lessThanOrEqual": "7.2.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.3",
|
|
"lessThanOrEqual": "*",
|
|
"status": "unaffected",
|
|
"versionType": "original_commit_for_fix"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"cpeApplicability": [
|
|
{
|
|
"nodes": [
|
|
{
|
|
"operator": "OR",
|
|
"negate": false,
|
|
"cpeMatch": [
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "5.10.273"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "5.15.224"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "6.1.191"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "6.6.161"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "6.12.115"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "6.18.59"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "7.2.13"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.15",
|
|
"versionEndExcluding": "7.3"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c2586874605ec23b611c57fe71d183d98f168971"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c611337aee17a0627e365e58e2b6e78803fb3c36"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/df4d01be5b318024bec68654c7af0ebc0e0ed8a1"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/6a36b05fc5b3d660fcc826133dc92e2fc87bd1de"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f0c077c36fda9d498db39199e3997860e985efc8"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/d00d5f534a8238674755e59826a6c7d3c8efb870"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c9716f956216eb74ab0aad7f633586edd49e0322"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c8f4cfe1cf93bce924e27f2abead7a4c4a487505"
|
|
}
|
|
],
|
|
"title": "KVM: nVMX: Reset MMU back to the root MMU if loading L2 state fails for !VM-Entry",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |