{"id":"CVE-2026-90178","revision":"5d10b76dd7e848d093912547d9a1455a","records":[{"revision":"5d10b76dd7e848d093912547d9a1455a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90178","aliases":[],"title":"hwmon: (coretemp) Fix core_data leak on CPUs without PTS","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (coretemp) Fix core_data leak on CPUs without PTS\n\npdata->core_data is allocated in init_temp_data() when the first core\ntemp_data of a package is created, but it is only released from\ndestroy_temp_data(), and only in the branch that handles the package\ntemp_data.\n\nPackage temp_data is created solely when the CPU supports\nX86_FEATURE_PTS. On a CPU without it, coretemp_cpu_online() never calls\ncoretemp_add_core() with pkg_flag set, so pdata->pkg_data stays NULL.\ncoretemp_cpu_offline() then skips the removal of the package interface,\ndestroy_temp_data() is never called for package data, and the array is\nstill allocated when coretemp_device_remove() frees the platform data\nthat pointed at it.\n\nRelease the array in coretemp_device_remove(). destroy_temp_data() sets\npdata->core_data to NULL when it frees it, so the added kfree() is a\nno-op on CPUs that do have PTS.\n\nTested on an Intel Core i5-1135G7. The driver was instrumented to log\nevery allocation and release of pdata->core_data, and the PTS check in\ncoretemp_cpu_online() was patched out to emulate a CPU without package\nthermal support. Without this change the array was allocated and never\nreleased, and coretemp_device_remove() still saw a non-NULL pointer.\nWith it the array is released and the pointer accounting balances. On an\nunmodified build the release still happens via the package temp_data and\nthe added kfree() sees NULL, with no slab warnings over repeated module\nload and unload cycles.","state":0,"publishedAt":"2026-09-17T16:07:03.759+00:00","modifiedAt":"2026-10-19T08:59:15.321+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/hwmon/coretemp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1a793caf6f6991716cb07583ed7c27de84ef0cba\",\n                            \"lessThan\": \"dc0d79b1be384e7f6a2308356afd10dcf3bf940f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1a793caf6f6991716cb07583ed7c27de84ef0cba\",\n                            \"lessThan\": \"86c1617b7d4b001b20a71deda3c791538a4fa6aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1a793caf6f6991716cb07583ed7c27de84ef0cba\",\n                            \"lessThan\": \"9b23a010a1e8232974617c412cb9f578f3378b70\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1a793caf6f6991716cb07583ed7c27de84ef0cba\",\n                            \"lessThan\": \"0cd8450c257faa0cece0e0c43d3b55d1a389acc7\",\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/hwmon/coretemp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\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/dc0d79b1be384e7f6a2308356afd10dcf3bf940f","https://git.kernel.org/stable/c/86c1617b7d4b001b20a71deda3c791538a4fa6aa","https://git.kernel.org/stable/c/9b23a010a1e8232974617c412cb9f578f3378b70","https://git.kernel.org/stable/c/0cd8450c257faa0cece0e0c43d3b55d1a389acc7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90178","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90178","identifiers":["CVE-2026-90178"]},"retained":false,"historicalAffected":[]}],"coverage":[]}