Medium 5.5Published May 27, 2026

CVE-2026-46021thermal: core: Fix thermal zone governor cleanup issues

Updated under an hour ago (Oct 28, 2026, 5:30 AM ET)

Does this affect you?

It affects Linux and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before a172fa18bc370b776ac1510abb0dcb50a7a35fac; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before 8e563d8db50f303171aceb79eec0807e7ba06951; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before d4eb861adde5ce22e459fbd29366f47bb2167977; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before 37a430a2d4e66ec8238da6c7f7e48809bf265e13; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before f412e541d25a3dfaf3d53e012ade6ff03cae8a45; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before 75f8f3c3e09122270986de9d7aa347d701676761; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06; from e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 before 41ff66baf81c6541f4f985dd7eac4494d03d9440	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4	NVD

References

References

https://git.kernel.org/stable/c/a172fa18bc370b776ac1510abb0dcb50a7a35fac
https://git.kernel.org/stable/c/8e563d8db50f303171aceb79eec0807e7ba06951
https://git.kernel.org/stable/c/d4eb861adde5ce22e459fbd29366f47bb2167977
https://git.kernel.org/stable/c/37a430a2d4e66ec8238da6c7f7e48809bf265e13	patch
https://git.kernel.org/stable/c/f412e541d25a3dfaf3d53e012ade6ff03cae8a45	patch
https://git.kernel.org/stable/c/75f8f3c3e09122270986de9d7aa347d701676761	patch
https://git.kernel.org/stable/c/64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06	patch
https://git.kernel.org/stable/c/41ff66baf81c6541f4f985dd7eac4494d03d9440	patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
1–10 of 11

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.