{"id":"CVE-2026-89442","revision":"f910ef98d750429d9c9691d2d7336e75","records":[{"revision":"f910ef98d750429d9c9691d2d7336e75","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89442","aliases":[],"title":"platform/x86: ISST: Validate socket ID in clos_assoc ioctl","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Validate socket ID in clos_assoc ioctl\n\nisst_if_clos_assoc() validates the user-supplied socket_id with\n'socket_id > topology_max_packages()', but isst_common.sst_inst[] is\nallocated with topology_max_packages() entries, so the valid index range\nis [0, topology_max_packages()).  The '>' comparison lets\nsocket_id == topology_max_packages() pass and index one entry past the\narray.\n\nIn addition, isst_common.sst_inst[socket_id] is NULL for an in-range\npackage that has no bound TPMI SST instance, and the pointer is used\nwithout a NULL check.  Both the out-of-bounds entry and the NULL pointer\nare then dereferenced by map_partition_power_domain_id() and the\nfollowing power_domain_info access.\n\nReject socket_id >= topology_max_packages() and a NULL sst_inst, matching\nthe checks already performed by get_instance().","state":0,"publishedAt":"2026-09-11T19:43:10.753+00:00","modifiedAt":"2026-10-19T08:46:51.77+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\": \"c847ea4851ecfa3462cc711ded2c3c3dd8d08ab8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"0d90ab5f80e19cddfeb0c9fab47a1f34aa932075\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"82e707eff9e3b7ef6d96ecc23ea8876d20c7d6ca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"207b4dc6eb100141b122b2602504a1429a4b6558\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12a7d2cb811dd8a884dea088a2701fcb8d00136e\",\n                            \"lessThan\": \"a89f07db0cb95c54dac4a8406c79a04e44a73c3c\",\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:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/c847ea4851ecfa3462cc711ded2c3c3dd8d08ab8","https://git.kernel.org/stable/c/0d90ab5f80e19cddfeb0c9fab47a1f34aa932075","https://git.kernel.org/stable/c/82e707eff9e3b7ef6d96ecc23ea8876d20c7d6ca","https://git.kernel.org/stable/c/207b4dc6eb100141b122b2602504a1429a4b6558","https://git.kernel.org/stable/c/a89f07db0cb95c54dac4a8406c79a04e44a73c3c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89442","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89442","identifiers":["CVE-2026-89442"]},"retained":false,"historicalAffected":[]}],"coverage":[]}