{"id":"CVE-2026-99168","revision":null,"records":[{"revision":"fc90a5c47f684dc3ae19300a8a5b22c6","observedAt":"2026-10-28T11:27:43.363+00:00","statement":{"source":"cve-program","id":"CVE-2026-99168","aliases":[],"title":"mshv_vtl: Check per-CPU register page before mmap","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmshv_vtl: Check per-CPU register page before mmap\n\nRegister-page setup is optional for each CPU. If allocation or\nregistration fails, mshv_vtl_configure_reg_page() warns and leaves that\nCPU's reg_page NULL, but initial context setup continues successfully.\nMeanwhile, successful setup on another CPU sets the global\nmshv_has_reg_page flag.\n\nmshv_vtl_fault() checks this global flag before selecting the requested\nCPU's register page. With mixed setup results across online CPUs, the\ncheck passes even for a CPU with no register page, reaching\nget_page(NULL) when userspace faults in that mapping.\n\nCheck the selected per-CPU register page before taking its reference and\nreturn VM_FAULT_SIGBUS if it is absent.","state":0,"publishedAt":"2026-10-28T10:35:19.539+00:00","modifiedAt":"2026-10-28T10:35:19.539+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/hv/mshv_vtl_main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f\",\n                            \"lessThan\": \"5c0757b065fbd140d8fbd05dc2c2146b713dfa68\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f\",\n                            \"lessThan\": \"874194a8de75fc2f4d1fb70c670b289b7e48f93e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/hv/mshv_vtl_main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.13\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/5c0757b065fbd140d8fbd05dc2c2146b713dfa68","https://git.kernel.org/stable/c/874194a8de75fc2f4d1fb70c670b289b7e48f93e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99168","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99168","identifiers":["CVE-2026-99168"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-31T14:05:03.5694547+00:00","complete":true,"records":1766,"lastAttemptAt":"2026-10-31T14:05:03.5694547+00:00","lastSuccessAt":"2026-10-31T14:05:03.9102612+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.910611+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-9266d7b009bf9c4a0ccdcb5cbdea7f905cb3c4d92fd3b41581ece16b2cfdc4e7-ec769fcf6e6e34bf3f0b54e1ac62cfffb542a122ab77efcad94c9e853e0b6490","complete":true,"records":417574,"lastAttemptAt":"2026-10-31T14:05:02.6830253+00:00","lastSuccessAt":"2026-10-31T13:33:54.3368861+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:02.6830253+00:00","snapshotPublishedAt":"2026-10-31T13:26:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-1ea90a365f5b43ef9a5b92be53fe0867","complete":true,"records":13565,"lastAttemptAt":"2026-10-31T14:05:07.41688+00:00","lastSuccessAt":"2026-10-31T11:34:32.033+00:00","error":null,"lastVerifiedAt":"2026-10-31T11:34:32.033+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13637,"expectedIdentifiers":13637,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-31T14:05:03.5694547+00:00","complete":true,"records":1094,"lastAttemptAt":"2026-10-31T14:05:03.5694547+00:00","lastSuccessAt":"2026-10-31T14:05:04.1115496+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:04.11155+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-fb26245244484b8385c58dbbcb23d928","complete":true,"records":13577,"lastAttemptAt":"2026-10-31T14:05:06.3072816+00:00","lastSuccessAt":"2026-10-31T14:05:06.296+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:06.296+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13637,"expectedIdentifiers":13637,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-21dcd6662970dfea02e4ea60ee637115e8d92664947484d2b9276b3f6568a84f","complete":true,"records":9815,"lastAttemptAt":"2026-10-31T14:05:03.2592715+00:00","lastSuccessAt":"2026-10-30T23:47:34.1817587+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.2592715+00:00","snapshotPublishedAt":"2026-10-30T23:33:17+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-2de9ccc5290f060c7aa63f89c25dd76f655a64ba1aba7c05c97fa3bee4f09899","complete":true,"records":1967,"lastAttemptAt":"2026-10-31T14:05:03.0514544+00:00","lastSuccessAt":"2026-10-28T20:55:34.2982937+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.0514544+00:00","snapshotPublishedAt":"2026-10-28T20:03:08+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f95f76cd406ae5bae3de632ad37fd2d5160b44f5e6b51748ac6f8f0c0c88e72b","complete":true,"records":3028,"lastAttemptAt":"2026-10-31T14:05:03.3781277+00:00","lastSuccessAt":"2026-10-30T23:47:38.4914494+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.3781277+00:00","snapshotPublishedAt":"2026-10-30T23:18:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-d37f475fd4943f3910741120036649d396d0a133edf936fc0112d88abf9bb041","complete":true,"records":230993,"lastAttemptAt":"2026-10-31T14:05:03.1555417+00:00","lastSuccessAt":"2026-10-31T12:35:41.6420764+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.1555417+00:00","snapshotPublishedAt":"2026-10-31T12:33:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}