{"api_version":"1","generated_at":"2026-05-06T11:59:34+00:00","cve":"CVE-2026-43096","urls":{"html":"https://cve.report/CVE-2026-43096","api":"https://cve.report/api/cve/CVE-2026-43096.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43096","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43096"},"summary":{"title":"mshv: Fix infinite fault loop on permission-denied GPA intercepts","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmshv: Fix infinite fault loop on permission-denied GPA intercepts\n\nPrevent infinite fault loops when guests access memory regions without\nproper permissions. Currently, mshv_handle_gpa_intercept() attempts to\nremap pages for all faults on movable memory regions, regardless of\nwhether the access type is permitted. When a guest writes to a read-only\nregion, the remap succeeds but the region remains read-only, causing\nimmediate re-fault and spinning the vCPU indefinitely.\n\nValidate intercept access type against region permissions before\nattempting remaps. Reject writes to non-writable regions and executes to\nnon-executable regions early, returning false to let the VMM handle the\nintercept appropriately.\n\nThis also closes a potential DoS vector where malicious guests could\nintentionally trigger these fault loops to consume host resources.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 10:16:23","updated_at":"2026-05-06 10:16:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/16cbec24897624051b324aa3a85859c38ca65fde","name":"https://git.kernel.org/stable/c/16cbec24897624051b324aa3a85859c38ca65fde","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/02226839079ccc558820a3b25c4c46812927b4ba","name":"https://git.kernel.org/stable/c/02226839079ccc558820a3b25c4c46812927b4ba","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43096","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43096","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b9a66cd5ccbb9fade15d0e427e19470d8ad35b75 02226839079ccc558820a3b25c4c46812927b4ba git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b9a66cd5ccbb9fade15d0e427e19470d8ad35b75 16cbec24897624051b324aa3a85859c38ca65fde git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.14 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hv/mshv_root_main.c","include/hyperv/hvgdk_mini.h","include/hyperv/hvhdk.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"02226839079ccc558820a3b25c4c46812927b4ba","status":"affected","version":"b9a66cd5ccbb9fade15d0e427e19470d8ad35b75","versionType":"git"},{"lessThan":"16cbec24897624051b324aa3a85859c38ca65fde","status":"affected","version":"b9a66cd5ccbb9fade15d0e427e19470d8ad35b75","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hv/mshv_root_main.c","include/hyperv/hvgdk_mini.h","include/hyperv/hvhdk.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.14","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmshv: Fix infinite fault loop on permission-denied GPA intercepts\n\nPrevent infinite fault loops when guests access memory regions without\nproper permissions. Currently, mshv_handle_gpa_intercept() attempts to\nremap pages for all faults on movable memory regions, regardless of\nwhether the access type is permitted. When a guest writes to a read-only\nregion, the remap succeeds but the region remains read-only, causing\nimmediate re-fault and spinning the vCPU indefinitely.\n\nValidate intercept access type against region permissions before\nattempting remaps. Reject writes to non-writable regions and executes to\nnon-executable regions early, returning false to let the VMM handle the\nintercept appropriately.\n\nThis also closes a potential DoS vector where malicious guests could\nintentionally trigger these fault loops to consume host resources."}],"providerMetadata":{"dateUpdated":"2026-05-06T07:40:27.453Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/02226839079ccc558820a3b25c4c46812927b4ba"},{"url":"https://git.kernel.org/stable/c/16cbec24897624051b324aa3a85859c38ca65fde"}],"title":"mshv: Fix infinite fault loop on permission-denied GPA intercepts","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43096","datePublished":"2026-05-06T07:40:27.453Z","dateReserved":"2026-05-01T14:12:55.984Z","dateUpdated":"2026-05-06T07:40:27.453Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 10:16:23","lastModifiedDate":"2026-05-06 10:16:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43096","Ordinal":"1","Title":"mshv: Fix infinite fault loop on permission-denied GPA intercept","CVE":"CVE-2026-43096","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43096","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmshv: Fix infinite fault loop on permission-denied GPA intercepts\n\nPrevent infinite fault loops when guests access memory regions without\nproper permissions. Currently, mshv_handle_gpa_intercept() attempts to\nremap pages for all faults on movable memory regions, regardless of\nwhether the access type is permitted. When a guest writes to a read-only\nregion, the remap succeeds but the region remains read-only, causing\nimmediate re-fault and spinning the vCPU indefinitely.\n\nValidate intercept access type against region permissions before\nattempting remaps. Reject writes to non-writable regions and executes to\nnon-executable regions early, returning false to let the VMM handle the\nintercept appropriately.\n\nThis also closes a potential DoS vector where malicious guests could\nintentionally trigger these fault loops to consume host resources.","Type":"Description","Title":"mshv: Fix infinite fault loop on permission-denied GPA intercept"}]}}}