Linux Kernel up to 5.12.9 caif caif_enroll_dev 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 categorized as critical has been discovered in Linux Kernel up to 5.12.9. Impacted is the function caif_enroll_dev of the component caif. Executing a manipulation can lead to memory leak. This vulnerability is registered as CVE-2021-47121. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.12.9. It has been declared as critical. This vulnerability affects the function caif_enroll_dev of the component caif. 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: caif: fix memory leak in cfusbl_device_notify In case of caif_enroll_dev() fail, allocated link_support won't be assigned to the corresponding structure. So simply free allocated pointer in case of error.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2021-47121 since 03/04/2024. There are known technical details, but no exploit is available.

Upgrading to version 4.4.272, 4.9.272, 4.14.236, 4.19.194, 5.4.125, 5.10.43, 5.12.10 or 5.13 eliminates this vulnerability. Applying the patch cc302e30a504/81afc61cb6e2/e8b37f5009ea/9ea0ab48e755/4d94f530cd24/46403c1f80b0/dde8686985ec/7f5d86669fa4 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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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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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 4.4.272/4.9.272/4.14.236/4.19.194/5.4.125/5.10.43/5.12.10/5.13
Patch: cc302e30a504/81afc61cb6e2/e8b37f5009ea/9ea0ab48e755/4d94f530cd24/46403c1f80b0/dde8686985ec/7f5d86669fa4

Timelineinfo

03/04/2024 🔍
03/15/2024 +11 days 🔍
03/15/2024 +0 days 🔍
01/07/2025 +298 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47121 (🔍)
GCVE (CVE): GCVE-0-2021-47121
GCVE (VulDB): GCVE-100-257020

Entryinfo

Created: 03/15/2024 22:51
Updated: 01/07/2025 21:25
Changes: 03/15/2024 22:51 (44), 01/07/2025 21:25 (26)
Complete: 🔍
Cache ID: 216::103

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