CVE-2026-46021
published 2026-05-27CVE-2026-46021: In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix thermal zone governor cleanup issues If…
high7
In 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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 < 37a430a2d4e66ec8238da6c7f7e48809bf265e13 | 37a430a2d4e66ec8238da6c7f7e48809bf265e13 |
| linux | linux | >= e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 < f412e541d25a3dfaf3d53e012ade6ff03cae8a45 | f412e541d25a3dfaf3d53e012ade6ff03cae8a45 |
| linux | linux | >= e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 < 75f8f3c3e09122270986de9d7aa347d701676761 | 75f8f3c3e09122270986de9d7aa347d701676761 |
| linux | linux | >= e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 < 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 | 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 |
| linux | linux | >= e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 < 41ff66baf81c6541f4f985dd7eac4494d03d9440 | 41ff66baf81c6541f4f985dd7eac4494d03d9440 |
| linux | linux_kernel | — | — |