Linux Kernel up to 5.12.6 on x86 ideapad-laptop dytc_cql_command null pointer dereference

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

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.12.6 on x86. This issue affects the function dytc_cql_command of the component ideapad-laptop. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2021-47079. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.12.6 on x86 (Operating System). Affected by this vulnerability is the function dytc_cql_command of the component ideapad-laptop. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: platform/x86: ideapad-laptop: fix a NULL pointer dereference The third parameter of dytc_cql_command should not be NULL since it will be dereferenced immediately.

The weakness was disclosed 03/02/2024. The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2021-47079 since 02/29/2024. Technical details are known, but no exploit is available.

Upgrading to version 5.12.7 or 5.13 eliminates this vulnerability. Applying the patch beab753fe3b4/ff67dbd554b2 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.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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 5.12.7/5.13
Patch: beab753fe3b4/ff67dbd554b2

Timelineinfo

02/29/2024 🔍
03/02/2024 +2 days 🔍
03/02/2024 +0 days 🔍
12/09/2024 +282 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47079 (🔍)
GCVE (CVE): GCVE-0-2021-47079
GCVE (VulDB): GCVE-100-255457

Entryinfo

Created: 03/02/2024 05:20
Updated: 12/09/2024 21:55
Changes: 03/02/2024 05:20 (45), 12/09/2024 21:55 (26)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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