Linux Kernel up to 6.18.15/6.19.5 hwmon of_parse_phandle_with_args memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.18.15/6.19.5. The impacted element is the function of_parse_phandle_with_args of the component hwmon. Executing a manipulation can lead to denial of service. This vulnerability is registered as CVE-2026-43165. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.18.15/6.19.5 and classified as critical. This vulnerability affects the function of_parse_phandle_with_args of the component hwmon. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: hwmon: (nct7363) Fix a resource leak in nct7363_present_pwm_fanin When calling of_parse_phandle_with_args(), the caller is responsible to call of_node_put() to release the reference of device node. In nct7363_present_pwm_fanin, it does not release the reference, causing a resource leak.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-43165 since 05/01/2026. Technical details are known, but there is no available exploit.

Upgrading to version 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch c8cde3ddd12ad7d0e6b5a3e0ea3914a9a778adf4/fb99b58763a95e20b214fc1dd86837ae00a400b7/4923bbff0bcffe488b3aa76829c829bd15b02585 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.16/6.19.6
Patch: c8cde3ddd12ad7d0e6b5a3e0ea3914a9a778adf4/fb99b58763a95e20b214fc1dd86837ae00a400b7/4923bbff0bcffe488b3aa76829c829bd15b02585

Timelineinfo

05/01/2026 CVE reserved
05/06/2026 +5 days Advisory disclosed
05/06/2026 +0 days VulDB entry created
05/17/2026 +11 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43165 (🔒)
GCVE (CVE): GCVE-0-2026-43165
GCVE (VulDB): GCVE-100-361390

Entryinfo

Created: 05/06/2026 16:30
Updated: 05/17/2026 14:14
Changes: 05/06/2026 16:30 (58), 05/17/2026 14:14 (11)
Complete: 🔍
Cache ID: 216::103

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