CVE-2026-90178

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90178", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.791Z", "datePublished": "2026-09-17T16:07:03.759Z", "dateUpdated": "2026-10-19T08:59:15.321Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:59:15.321Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/coretemp.c"], "versions": [{"version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "lessThan": "dc0d79b1be384e7f6a2308356afd10dcf3bf940f", "status": "affected", "versionType": "git"}, {"version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "lessThan": "86c1617b7d4b001b20a71deda3c791538a4fa6aa", "status": "affected", "versionType": "git"}, {"version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "lessThan": "9b23a010a1e8232974617c412cb9f578f3378b70", "status": "affected", "versionType": "git"}, {"version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "lessThan": "0cd8450c257faa0cece0e0c43d3b55d1a389acc7", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/coretemp.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dc0d79b1be384e7f6a2308356afd10dcf3bf940f"}, {"url": "https://git.kernel.org/stable/c/86c1617b7d4b001b20a71deda3c791538a4fa6aa"}, {"url": "https://git.kernel.org/stable/c/9b23a010a1e8232974617c412cb9f578f3378b70"}, {"url": "https://git.kernel.org/stable/c/0cd8450c257faa0cece0e0c43d3b55d1a389acc7"}], "title": "hwmon: (coretemp) Fix core_data leak on CPUs without PTS", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hwmon/coretemp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "dc0d79b1be384e7f6a2308356afd10dcf3bf940f", "status": "affected", "version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "versionType": "git"}, {"lessThan": "86c1617b7d4b001b20a71deda3c791538a4fa6aa", "status": "affected", "version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "versionType": "git"}, {"lessThan": "9b23a010a1e8232974617c412cb9f578f3378b70", "status": "affected", "version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "versionType": "git"}, {"lessThan": "0cd8450c257faa0cece0e0c43d3b55d1a389acc7", "status": "affected", "version": "1a793caf6f6991716cb07583ed7c27de84ef0cba", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hwmon/coretemp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-90178", "lastModified": "2026-10-19T09:19:07.800", "metrics": {}, "published": "2026-09-17T17:17:11.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0cd8450c257faa0cece0e0c43d3b55d1a389acc7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86c1617b7d4b001b20a71deda3c791538a4fa6aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9b23a010a1e8232974617c412cb9f578f3378b70"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc0d79b1be384e7f6a2308356afd10dcf3bf940f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a793caf6f6991716cb07583ed7c27de84ef0cba,dc0d79b1be384e7f6a2308356afd10dcf3bf940f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a793caf6f6991716cb07583ed7c27de84ef0cba,86c1617b7d4b001b20a71deda3c791538a4fa6aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a793caf6f6991716cb07583ed7c27de84ef0cba,9b23a010a1e8232974617c412cb9f578f3378b70)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a793caf6f6991716cb07583ed7c27de84ef0cba,0cd8450c257faa0cece0e0c43d3b55d1a389acc7)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T18:30:11.914461+00:00", "updated": "2026-09-19T03:00:13.271831+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401"]}