{"id":"CVE-2026-89443","revision":"1e8b0ba6ff104c55968367c0062db77d","records":[{"revision":"1e8b0ba6ff104c55968367c0062db77d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89443","aliases":[],"title":"platform/x86: ISST: Validate level in perf mask ioctls","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Validate level in perf mask ioctls\n\nisst_if_get_perf_level_mask() and isst_if_get_base_freq_mask() use the\nuser-provided level as an index into perf_levels[] via\n_read_pp_level_info() and _read_bf_level_info(), but neither helper\nvalidates it first.\n\nThe adjacent level-info helpers reject levels above max_level before\nreading the same per-level register block. Add the same bounds checks to\nthe mask helpers, and reject disabled SST-PP levels in\nisst_if_get_perf_level_mask() to match isst_if_get_perf_level_info().\n\nThis prevents out-of-bounds reads from the per-level offset table on\ninvalid ioctl input.","state":0,"publishedAt":"2026-09-11T19:43:11.407+00:00","modifiedAt":"2026-10-19T08:46:52.766+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\": \"ea009e4769fa3bd05d4c111c3b6865eb3a9be829\",\n                            \"lessThan\": \"beb22ebf76c0415f22d2d0c3f1ff0627e7ae4a68\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ea009e4769fa3bd05d4c111c3b6865eb3a9be829\",\n                            \"lessThan\": \"1a8bab5ceee1a42a78de12d3d69f67516a20588e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ea009e4769fa3bd05d4c111c3b6865eb3a9be829\",\n                            \"lessThan\": \"1889a9156553f0692acd57caf15e877baace1a01\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ea009e4769fa3bd05d4c111c3b6865eb3a9be829\",\n                            \"lessThan\": \"d19385624bdfb577db9c94bb8879992fd5e17bcd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ea009e4769fa3bd05d4c111c3b6865eb3a9be829\",\n                            \"lessThan\": \"80e0d353c86a9a168ad6d213f494796294381538\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/beb22ebf76c0415f22d2d0c3f1ff0627e7ae4a68","https://git.kernel.org/stable/c/1a8bab5ceee1a42a78de12d3d69f67516a20588e","https://git.kernel.org/stable/c/1889a9156553f0692acd57caf15e877baace1a01","https://git.kernel.org/stable/c/d19385624bdfb577db9c94bb8879992fd5e17bcd","https://git.kernel.org/stable/c/80e0d353c86a9a168ad6d213f494796294381538"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89443","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89443","identifiers":["CVE-2026-89443"]},"retained":false,"historicalAffected":[]}],"coverage":[]}