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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于热区治理器清理问题，可能导致内存泄漏或释放后重用。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.13% · P3

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< a172fa18bc370b776ac1510abb0dcb50a7a35fac affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< 8e563d8db50f303171aceb79eec0807e7ba06951 affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< d4eb861adde5ce22e459fbd29366f47bb2167977 affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< 37a430a2d4e66ec8238da6c7f7e48809bf265e13 affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< f412e541d25a3dfaf3d53e012ade6ff03cae8a45 affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< 75f8f3c3e09122270986de9d7aa347d701676761 affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< 64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06 affected
e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8< 41ff66baf81c6541f4f985dd7eac4494d03d9440 affected
… +10 more rows
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I. Basic Information for CVE-2026-46021

Vulnerability Information
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Vulnerability Title
thermal: core: Fix thermal zone governor cleanup issues
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于热区治理器清理问题，可能导致内存泄漏或释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 ~ a172fa18bc370b776ac1510abb0dcb50a7a35fac -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-46021

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III. Intelligence Information for CVE-2026-46021

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Patches & Fixes for CVE-2026-46021 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration
CVE-2026-46036 7.8 HIGH vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-46062 7.8 HIGH ntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-45894 7.8 HIGH iommu/vt-d: Clear Present bit before tearing down PASID entry

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46021

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