Linux Kernel up to 5.8.9 virt/kvm/kvm_main.c kvm_io_bus_unregister_dev memory leak

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 5.8.9. Impacted is the function kvm_io_bus_unregister_dev of the file virt/kvm/kvm_main.c. Performing a manipulation results in memory leak. This vulnerability is identified as CVE-2020-36312. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.8.9 (Operating System). This affects the function kvm_io_bus_unregister_dev of the file virt/kvm/kvm_main.c. 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.

The weakness was released 04/07/2021. It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2020-36312. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.8.10 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch 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

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: No
Local: No
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 5.8.10
Patch: git.kernel.org

Timelineinfo

04/06/2021 🔍
04/07/2021 +1 days 🔍
04/07/2021 +0 days 🔍
04/11/2021 +4 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2020-36312 (🔍)
GCVE (CVE): GCVE-0-2020-36312
GCVE (VulDB): GCVE-100-172551

Entryinfo

Created: 04/07/2021 13:18
Updated: 04/11/2021 10:48
Changes: 04/07/2021 13:18 (43), 04/11/2021 10:48 (5)
Complete: 🔍
Cache ID: 216::103

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