VDB-257851 · CVE-2021-47147 · WID-SEC-2024-0699

Linux Kernel up to 5.12.8 ocp pci_ioremap_bar memory leak

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6.0	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.12.8. Affected by this vulnerability is the function pci_ioremap_bar of the component ocp. This manipulation causes memory leak. This vulnerability is handled as CVE-2021-47147. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.12.8. Affected by this vulnerability is the function pci_ioremap_bar of the component ocp. 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: ptp: ocp: Fix a resource leak in an error handling path If an error occurs after a successful 'pci_ioremap_bar()' call, it must be undone by a corresponding 'pci_iounmap()' call, as already done in the remove function.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2021-47147 since 03/04/2024. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.12.9 or 5.13 eliminates this vulnerability. Applying the patch 0e38e702f115/9c1bb37f8cad 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 CERT Bund (WID-SEC-2024-0699). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
EMC Avamar
Dell NetWorker
Open Source Linux Kernel
IBM Spectrum Protect Plus

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: 6.0
VulDB Meta Temp Score: 6.0

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

NVD Base Score: 6.2
NVD Vector: 🔍

CNA Base Score: 6.2
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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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 5.12.9/5.13
Patch: 0e38e702f115/9c1bb37f8cad

Timelineinfo

03/04/2024 🔍
03/25/2024 +21 days 🔍
03/25/2024 +0 days 🔍
09/16/2025 +540 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47147 (🔍)
GCVE (CVE): GCVE-0-2021-47147
GCVE (VulDB): GCVE-100-257851
CERT Bund: WID-SEC-2024-0699 - Linux-Kernel: Mehrere Schwachstellen ermöglichen Denial of Service und unspezifische Angriffe

Entryinfo

Created: 03/25/2024 11:06
Updated: 09/16/2025 18:58
Changes: 03/25/2024 11:06 (58), 10/31/2024 17:12 (13), 08/04/2025 06:38 (7), 09/16/2025 18:58 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.