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CVE-2023-52473— thermal: core: Fix NULL pointer dereference in zone registration error path

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，该漏洞源于存在NULL指针取消引用问题。

AI Predicted 3.3 Difficulty: Moderate EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 3d439b1a2ad36c8b4ea151c8de25309d60d17407< 335176dd8ebaca6493807dceea33c478305667fa affected
3d439b1a2ad36c8b4ea151c8de25309d60d17407< 02871710b93058eb1249d5847c0b2d1c2c3c98ae affected
3d439b1a2ad36c8b4ea151c8de25309d60d17407< 04e6ccfc93c5a1aa1d75a537cf27e418895e20ea affected
6.4 affected
< 6.4 unaffected
6.6.14≤ 6.6.* unaffected
6.7.2≤ 6.7.* unaffected
6.8≤ * unaffected
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I. Basic Information for CVE-2023-52473

Vulnerability Information
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Vulnerability Title
thermal: core: Fix NULL pointer dereference in zone registration error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix NULL pointer dereference in zone registration error path If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp). Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more. Drop it to address the NULL pointer dereference.
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，该漏洞源于存在NULL指针取消引用问题。
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 3d439b1a2ad36c8b4ea151c8de25309d60d17407 ~ 335176dd8ebaca6493807dceea33c478305667fa -
Linux Linux 6.4 -

II. Public POCs for CVE-2023-52473

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III. Intelligence Information for CVE-2023-52473

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Other References for CVE-2023-52473 (3)

Same Patch Batch · Linux · 2024-02-25 · 11 CVEs total

CVE-2023-52469 7.8 HIGH drivers/amd/pm: fix a use-after-free in kv_parse_power_table
CVE-2023-52465 power: supply: Fix null pointer dereference in smb2_probe
CVE-2023-52467 mfd: syscon: Fix null pointer dereference in of_syscon_register()
CVE-2023-52468 class: fix use-after-free in class_register()
CVE-2023-52470 drm/radeon: check the alloc_workqueue return value in radeon_crtc_init()
CVE-2023-52471 ice: Fix some null pointer dereference issues in ice_ptp.c
CVE-2023-52472 crypto: rsa - add a check for allocation failure
CVE-2021-46904 net: hso: fix null-ptr-deref during tty device unregistration
CVE-2021-46905 net: hso: fix NULL-deref on disconnect regression
CVE-2022-48626 moxart: fix potential use-after-free on remove path

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52473

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