thermal: core: Fix thermal zone governor cleanup issues

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Summary

CVECVE-2026-46021
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:20 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix thermal zone governor cleanup issues If thermal_zone_device_register_with_trips() fails after adding a thermal governor to the thermal zone being registered, the governor is not removed from it as appropriate which may lead to a memory leak. In turn, thermal_zone_device_unregister() calls thermal_set_governor() without acquiring the thermal zone lock beforehand which may race with a governor update via sysfs and may lead to a use-after-free in that case. Address these issues by adding two thermal_set_governor() calls, one to thermal_release() to remove the governor from the given thermal zone, and one to the thermal zone registration error path to cover failures preceding the thermal zone device registration.

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.050770000 (date 2026-06-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 37a430a2d4e66ec8238da6c7f7e48809bf265e13 git Not specified
CNA Linux Linux affected e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 f412e541d25a3dfaf3d53e012ade6ff03cae8a45 git Not specified
CNA Linux Linux affected e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 75f8f3c3e09122270986de9d7aa347d701676761 git Not specified
CNA Linux Linux affected e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 git Not specified
CNA Linux Linux affected e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 41ff66baf81c6541f4f985dd7eac4494d03d9440 git Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/41ff66baf81c6541f4f985dd7eac4494d03d9440 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/37a430a2d4e66ec8238da6c7f7e48809bf265e13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f412e541d25a3dfaf3d53e012ade6ff03cae8a45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/75f8f3c3e09122270986de9d7aa347d701676761 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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