cve/published/2021/CVE-2021-46977.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: VMX: Disable preemption when probing user return MSRs\n\nDisable preemption when probing a user return MSR via RDSMR/WRMSR.  If\nthe MSR holds a different value per logical CPU, the WRMSR could corrupt\nthe host's value if KVM is preempted between the RDMSR and WRMSR, and\nthen rescheduled on a different CPU.\n\nOpportunistically land the helper in common x86, SVM will use the helper\nin a future commit."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "arch/x86/include/asm/kvm_host.h",
                  "arch/x86/kvm/vmx/vmx.c",
                  "arch/x86/kvm/x86.c"
               ],
               "versions": [
                  {
                     "version": "4be5341026246870818e28b53202b001426a5aec",
                     "lessThan": "31f29749ee970c251b3a7e5b914108425940d089",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "4be5341026246870818e28b53202b001426a5aec",
                     "lessThan": "5adcdeb57007ccf8ab7ac20bf787ffb6fafb1a94",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "4be5341026246870818e28b53202b001426a5aec",
                     "lessThan": "e3ea1895df719c4ef87862501bb10d95f4177bed",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "4be5341026246870818e28b53202b001426a5aec",
                     "lessThan": "5104d7ffcf24749939bea7fdb5378d186473f890",
                     "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/include/asm/kvm_host.h",
                  "arch/x86/kvm/vmx/vmx.c",
                  "arch/x86/kvm/x86.c"
               ],
               "versions": [
                  {
                     "version": "5.5",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.5",
                     "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": "5.5",
                           "versionEndExcluding": "5.10.38"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.5",
                           "versionEndExcluding": "5.11.22"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.5",
                           "versionEndExcluding": "5.12.5"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.5",
                           "versionEndExcluding": "5.13"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/31f29749ee970c251b3a7e5b914108425940d089"
            },
            {
               "url": "https://git.kernel.org/stable/c/5adcdeb57007ccf8ab7ac20bf787ffb6fafb1a94"
            },
            {
               "url": "https://git.kernel.org/stable/c/e3ea1895df719c4ef87862501bb10d95f4177bed"
            },
            {
               "url": "https://git.kernel.org/stable/c/5104d7ffcf24749939bea7fdb5378d186473f890"
            }
         ],
         "title": "KVM: VMX: Disable preemption when probing user return MSRs",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-46977",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}