VDB-266203 · CVE-2021-47529 · GCVE-0-2021-47529

Linux Kernel up to 5.15.6 iwlwifi reduce_power_data memory leak

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.6. It has been rated as critical. This vulnerability affects the function reduce_power_data of the component iwlwifi. This manipulation causes memory leak. This vulnerability appears as CVE-2021-47529. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.15.6. Affected by this vulnerability is the function reduce_power_data of the component iwlwifi. 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: iwlwifi: Fix memory leaks in error handling path Should an error occur (invalid TLV len or memory allocation failure), the memory already allocated in 'reduce_power_data' should be freed before returning, otherwise it is leaking.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2021-47529 since 05/24/2024. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.15.7 eliminates this vulnerability. Applying the patch 4768935c2540/a571bc28326d 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

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

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

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.15.7
Patch: 4768935c2540/a571bc28326d

Timelineinfo

05/24/2024 🔍
05/24/2024 +0 days 🔍
05/24/2024 +0 days 🔍
05/24/2024 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47529 (🔍)
GCVE (CVE): GCVE-0-2021-47529
GCVE (VulDB): GCVE-100-266203

Entryinfo

Created: 05/24/2024 18:39
Changes: 05/24/2024 18:39 (58)
Complete: 🔍
Cache ID: 216::103