{"id":"CVE-2026-46131","state":"PUBLISHED","title":"KVM: x86: check for nEPT/nNPT in slow flush hypercalls","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: check for nEPT/nNPT in slow flush hypercalls\n\nChecking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa()\nis only valid if an L2 guest is running *with nested EPT/NPT enabled*.\nInstead use the same condition as translate_nested_gpa() itself.","publishedAt":"2026-05-28T09:35:46.220Z","updatedAt":"2026-06-14T17:56:46.141Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"971f17f5d91045404e3914029ea57c3da90179a4","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"45fc766bc756ff1d66f8ca026a9c4f7f764adfae","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"d6f4e217d663ede5becc2fd6cb612c749677387b","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"464af6fc2b1dcc74005b7f58ee3812b17777efee","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/hyperv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/hyperv.c"]}],"references":["https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4","https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae","https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b","https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57","https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46131.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46131","state":"PUBLISHED","datePublished":"2026-05-28T09:35:46.220Z","dateUpdated":"2026-06-14T17:56:46.141Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.099Z"},"containers":{"cna":{"title":"KVM: x86: check for nEPT/nNPT in slow flush hypercalls","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: check for nEPT/nNPT in slow flush hypercalls\n\nChecking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa()\nis only valid if an L2 guest is running *with nested EPT/NPT enabled*.\nInstead use the same condition as translate_nested_gpa() itself."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"971f17f5d91045404e3914029ea57c3da90179a4","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"45fc766bc756ff1d66f8ca026a9c4f7f764adfae","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"d6f4e217d663ede5becc2fd6cb612c749677387b","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57","versionType":"git"},{"version":"aee738236dca0d0870789138ec494e15d6303566","status":"affected","lessThan":"464af6fc2b1dcc74005b7f58ee3812b17777efee","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/hyperv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/hyperv.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4"},{"url":"https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae"},{"url":"https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b"},{"url":"https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57"},{"url":"https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:56:46.141Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}