Linux Kernel up to 5.12.4 mcp251xfd mcp251xfd_probe 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 was found in Linux Kernel up to 5.12.4. This vulnerability affects the function mcp251xfd_probe of the component mcp251xfd. Such manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2021-46995. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.12.4 (Operating System) and classified as critical. Affected by this issue is the function mcp251xfd_probe of the component mcp251xfd. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: can: mcp251xfd: mcp251xfd_probe(): fix an error pointer dereference in probe When we converted this code to use dev_err_probe() we accidentally removed a return. It means that if devm_clk_get() it will lead to an Oops when we call clk_get_rate() on the next line.

The weakness was presented 02/28/2024. The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2021-46995 since 02/27/2024. Technical details are known, but there is no available exploit.

Upgrading to version 5.12.5 or 5.13 eliminates this vulnerability. Applying the patch 15f8f96ec7fc/4cc7faa40697 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

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Vendor

Name

Version

License

Website

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 5.12.5/5.13
Patch: 15f8f96ec7fc/4cc7faa40697

Timelineinfo

02/27/2024 🔍
02/28/2024 +1 days 🔍
02/28/2024 +0 days 🔍
12/06/2024 +282 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-46995 (🔍)
GCVE (CVE): GCVE-0-2021-46995
GCVE (VulDB): GCVE-100-255038

Entryinfo

Created: 02/28/2024 10:55
Updated: 12/06/2024 17:12
Changes: 02/28/2024 10:55 (44), 12/06/2024 17:12 (26)
Complete: 🔍
Cache ID: 216::103

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