{"id":"CVE-2026-89438","revision":"b0755033f51844289871cdd1b12fe366","records":[{"revision":"b0755033f51844289871cdd1b12fe366","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89438","aliases":[],"title":"platform/x86: ISST: Validate logical CPU id and clos id","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Validate logical CPU id and clos id\n\nValidate max CLOS ID and logical CPU ID for core power feature.\nReject any clos level or logical CPU number greater than the\nsupported maximum. These are used to calculate MMIO offset.","state":0,"publishedAt":"2026-09-11T19:43:08.077+00:00","modifiedAt":"2026-10-19T08:46:46.711+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/platform/x86/intel/speed_select_if/isst_tpmi_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"0d601126c7afda9bb94dfecc8b2c0a16f20d76cb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"c9ee2770eb95ba316a56d776b2b66666b70c194b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"5b032e1dda486ca41d10536bd195bd8a559af1e2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"82d4afadb02fb4d7d7bb9230900904c10e49ec87\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"124e2dbabe460c2a6e7440f4ad8af560131295c9\",\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/platform/x86/intel/speed_select_if/isst_tpmi_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\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/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb","https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b","https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2","https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87","https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89438","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89438","identifiers":["CVE-2026-89438"]},"retained":false,"historicalAffected":[]}],"coverage":[]}