Linux Kernel up to 5.15.5 r8188eu rtw_wx_read32 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, which was classified as critical, was found in Linux Kernel up to 5.15.5. This issue affects the function rtw_wx_read32 of the component r8188eu. The manipulation results in memory leak. This vulnerability is identified as CVE-2021-47570. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.5. It has been classified as critical. Affected is the function rtw_wx_read32 of the component r8188eu. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: staging: r8188eu: fix a memory leak in rtw_wx_read32() Free "ptmp" before returning -EINVAL.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2021-47570. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 243905 (Linux Distros Unpatched Vulnerability : CVE-2021-47570), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.6 eliminates this vulnerability. Applying the patch c8d3775745ad/be4ea8f38355 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.

The vulnerability is also documented in the vulnerability database at Tenable (243905). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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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

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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: 🔍

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Nessus ID: 243905
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-47570

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.15.6
Patch: c8d3775745ad/be4ea8f38355

Timelineinfo

05/24/2024 🔍
05/24/2024 +0 days 🔍
08/06/2025 +439 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47570 (🔍)
GCVE (CVE): GCVE-0-2021-47570
GCVE (VulDB): GCVE-100-266226

Entryinfo

Created: 05/24/2024 18:46
Updated: 08/06/2025 17:00
Changes: 05/24/2024 18:46 (57), 08/06/2025 17:00 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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