329 lines
15 KiB
JSON
329 lines
15 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2021-46978",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2024-02-27T18:42:55.944Z",
|
|
"datePublished": "2024-02-28T08:13:09.106Z",
|
|
"dateUpdated": "2026-05-23T15:18:50.711Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-05-23T15:18:50.711Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Always make an attempt to map eVMCS after migration\n\nWhen enlightened VMCS is in use and nested state is migrated with\nvmx_get_nested_state()/vmx_set_nested_state() KVM can't map evmcs\npage right away: evmcs gpa is not 'struct kvm_vmx_nested_state_hdr'\nand we can't read it from VP assist page because userspace may decide\nto restore HV_X64_MSR_VP_ASSIST_PAGE after restoring nested state\n(and QEMU, for example, does exactly that). To make sure eVMCS is\nmapped /vmx_set_nested_state() raises KVM_REQ_GET_NESTED_STATE_PAGES\nrequest.\n\nCommit f2c7ef3ba955 (\"KVM: nSVM: cancel KVM_REQ_GET_NESTED_STATE_PAGES\non nested vmexit\") added KVM_REQ_GET_NESTED_STATE_PAGES clearing to\nnested_vmx_vmexit() to make sure MSR permission bitmap is not switched\nwhen an immediate exit from L2 to L1 happens right after migration (caused\nby a pending event, for example). Unfortunately, in the exact same\nsituation we still need to have eVMCS mapped so\nnested_sync_vmcs12_to_shadow() reflects changes in VMCS12 to eVMCS.\n\nAs a band-aid, restore nested_get_evmcs_page() when clearing\nKVM_REQ_GET_NESTED_STATE_PAGES in nested_vmx_vmexit(). The 'fix' is far\nfrom being ideal as we can't easily propagate possible failures and even if\nwe could, this is most likely already too late to do so. The whole\n'KVM_REQ_GET_NESTED_STATE_PAGES' idea for mapping eVMCS after migration\nseems to be fragile as we diverge too much from the 'native' path when\nvmptr loading happens on vmx_set_nested_state()."
|
|
}
|
|
],
|
|
"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": "0faceb7d6dda6f370ff1fa0464d7180f7e5cb417",
|
|
"lessThan": "c8bf64e3fb77cc19bad146fbe26651985b117194",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2c7ef3ba9556d62a7e2bb23b563c6510007d55c",
|
|
"lessThan": "200a45649ab7361bc80c70aebf7165b64f9a6c9f",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2c7ef3ba9556d62a7e2bb23b563c6510007d55c",
|
|
"lessThan": "bd0e8455b85b651a4c77de9616e307129b15aaa7",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2c7ef3ba9556d62a7e2bb23b563c6510007d55c",
|
|
"lessThan": "f5c7e8425f18fdb9bdb7d13340651d7876890329",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "5.10.13",
|
|
"lessThan": "5.10.38",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"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": "5.11",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "5.11",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.38",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.11.22",
|
|
"lessThanOrEqual": "5.11.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.12.5",
|
|
"lessThanOrEqual": "5.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.13",
|
|
"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": "5.10.13",
|
|
"versionEndExcluding": "5.10.38"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.11",
|
|
"versionEndExcluding": "5.11.22"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.11",
|
|
"versionEndExcluding": "5.12.5"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.11",
|
|
"versionEndExcluding": "5.13"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c8bf64e3fb77cc19bad146fbe26651985b117194"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/200a45649ab7361bc80c70aebf7165b64f9a6c9f"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/bd0e8455b85b651a4c77de9616e307129b15aaa7"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f5c7e8425f18fdb9bdb7d13340651d7876890329"
|
|
}
|
|
],
|
|
"title": "KVM: nVMX: Always make an attempt to map eVMCS after migration",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"type": "CWE",
|
|
"lang": "en",
|
|
"description": "CWE-noinfo Not enough information"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"vendor": "linux",
|
|
"product": "linux_kernel",
|
|
"cpes": [
|
|
"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
|
|
],
|
|
"defaultStatus": "unknown",
|
|
"versions": [
|
|
{
|
|
"version": "0faceb7d6dda",
|
|
"status": "affected",
|
|
"lessThan": "c8bf64e3fb77",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2c7ef3ba955",
|
|
"status": "affected",
|
|
"lessThan": "200a45649ab7",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2c7ef3ba955",
|
|
"status": "affected",
|
|
"lessThan": "bd0e8455b85b",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2c7ef3ba955",
|
|
"status": "affected",
|
|
"lessThan": "f5c7e8425f18",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "5.11",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"status": "affected",
|
|
"lessThan": "5.11*",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.38",
|
|
"status": "affected",
|
|
"lessThanOrEqual": "5.11*",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.12.5",
|
|
"status": "affected",
|
|
"lessThanOrEqual": "5.12*",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.13",
|
|
"status": "affected",
|
|
"lessThanOrEqual": "*",
|
|
"versionType": "semver"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"scope": "UNCHANGED",
|
|
"version": "3.1",
|
|
"baseScore": 7.8,
|
|
"attackVector": "LOCAL",
|
|
"baseSeverity": "HIGH",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
|
|
"integrityImpact": "HIGH",
|
|
"userInteraction": "NONE",
|
|
"attackComplexity": "LOW",
|
|
"availabilityImpact": "HIGH",
|
|
"privilegesRequired": "LOW",
|
|
"confidentialityImpact": "HIGH"
|
|
}
|
|
},
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2024-11-04T17:39:28.108559Z",
|
|
"id": "CVE-2021-46978",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2024-11-04T17:46:50.654Z"
|
|
}
|
|
},
|
|
{
|
|
"providerMetadata": {
|
|
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
|
"shortName": "CVE",
|
|
"dateUpdated": "2024-08-04T05:24:37.902Z"
|
|
},
|
|
"title": "CVE Program Container",
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/c8bf64e3fb77cc19bad146fbe26651985b117194",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/200a45649ab7361bc80c70aebf7165b64f9a6c9f",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/bd0e8455b85b651a4c77de9616e307129b15aaa7",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f5c7e8425f18fdb9bdb7d13340651d7876890329",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |