{"id":"CVE-2026-46021","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Fix thermal zone governor cleanup issues\n\nIf thermal_zone_device_register_with_trips() fails after adding\na thermal governor to the thermal zone being re…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Fix thermal zone governor cleanup issues\n\nIf thermal_zone_device_register_with_trips() fails after adding\na thermal governor to the thermal zone being re…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.2, < 6.6.140","linux_kernel >= 6.7, < 6.12.86","linux_kernel >= 6.13, < 6.18.27","linux_kernel >= 6.19, < 7.0.4"],"patched":["linux_kernel 7.0.4"],"published":"2026-05-27","updated":"2026-09-08","sourceUpdated":"2026-09-08T09:18:06.463","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46021","references":[{"url":"https://git.kernel.org/stable/c/37a430a2d4e66ec8238da6c7f7e48809bf265e13","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/41ff66baf81c6541f4f985dd7eac4494d03d9440","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/75f8f3c3e09122270986de9d7aa347d701676761","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e563d8db50f303171aceb79eec0807e7ba06951","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a172fa18bc370b776ac1510abb0dcb50a7a35fac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d4eb861adde5ce22e459fbd29366f47bb2167977","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f412e541d25a3dfaf3d53e012ade6ff03cae8a45","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00138,"epssPercentile":0.03605,"ingestedAt":"2026-09-08T13:33:24.237Z","slug":"CVE-2026-46021","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Fix thermal zone governor cleanup issues\n\nIf thermal_zone_device_register_with_trips() fails after adding\na thermal governor to the thermal zone being registered, the\ngovernor is not removed from it as appropriate which may lead to\na memory leak.\n\nIn turn, thermal_zone_device_unregister() calls thermal_set_governor()\nwithout acquiring the thermal zone lock beforehand which may race with\na governor update via sysfs and may lead to a use-after-free in that\ncase.\n\nAddress these issues by adding two thermal_set_governor() calls, one to\nthermal_release() to remove the governor from the given thermal zone,\nand one to the thermal zone registration error path to cover failures\npreceding the thermal zone device registration.\n\n## Affected\n\n- `linux_kernel >= 4.2, < 6.6.140`\n- `linux_kernel >= 6.7, < 6.12.86`\n- `linux_kernel >= 6.13, < 6.18.27`\n- `linux_kernel >= 6.19, < 7.0.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.4`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}