CVE-2026-46021thermal: core: Fix thermal zone governor cleanup issues
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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
- 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/37a430a2d4e66ec8238da6c7f7e48809bf265e13patch
- https://git.kernel.org/stable/c/f412e541d25a3dfaf3d53e012ade6ff03cae8a45patch
- https://git.kernel.org/stable/c/75f8f3c3e09122270986de9d7aa347d701676761patch
- https://git.kernel.org/stable/c/64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06patch
- https://git.kernel.org/stable/c/41ff66baf81c6541f4f985dd7eac4494d03d9440patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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.