Linux Kernel up to 7.1.4 cpcap-battery cpcap-battery.c cpcap_battery_detect_battery_type memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k1.01-

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.1.177/6.6.144/6.12.96/6.18.39/7.1.4 and classified as critical. Affected is the function cpcap_battery_detect_battery_type of the file drivers/power/supply/cpcap-battery.c of the component cpcap-battery. This manipulation causes memory leak. This vulnerability is handled as CVE-2026-72214. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.1.177/6.6.144/6.12.96/6.18.39/7.1.4 and classified as critical. Affected by this vulnerability is the function cpcap_battery_detect_battery_type of the file drivers/power/supply/cpcap-battery.c of the component cpcap-battery. The manipulation with an unknown input leads to a memory leak 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: power: supply: cpcap-battery: Fix missing nvmem_device_put() causing reference leak In cpcap_battery_detect_battery_type(), the reference to an nvmem device obtained via nvmem_device_find() is not released with nvmem_device_put() on the success or read-failure paths, causing a permanent reference leak. The driver’s retry logic on subsequent battery property reads can compound this leak, preventing the nvmem device from ever being freed. Found by code review.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-72214 since 08/09/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch fc65520fe0781a1ff46631f111e07b4a1c677b96/700c225d829a1256b59053c34a1a9d1a6ab70b09/deaf6b3f8187231ad8f7770b10ed0be2cd47e9b2/a3d81de441233a92ec21469cd0c4eb3c26b95cd8/b56a5cbf8f1f1a5740f1137c89b14d0373309d8d/a2c14ff63e0e02e3c832385e523e9cc81301171c is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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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: No

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 6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: fc65520fe0781a1ff46631f111e07b4a1c677b96/700c225d829a1256b59053c34a1a9d1a6ab70b09/deaf6b3f8187231ad8f7770b10ed0be2cd47e9b2/a3d81de441233a92ec21469cd0c4eb3c26b95cd8/b56a5cbf8f1f1a5740f1137c89b14d0373309d8d/a2c14ff63e0e02e3c832385e523e9cc81301171c

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-72214 (🔒)
GCVE (CVE): GCVE-0-2026-72214
GCVE (VulDB): GCVE-100-390631

Entryinfo

Created: 08/15/2026 13:29
Changes: 08/15/2026 13:29 (60)
Complete: 🔍
Cache ID: 216::103

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