Linux Kernel AMD KVM virt_ext authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel. Affected by this vulnerability is an unknown functionality of the component AMD KVM. The manipulation of the argument virt_ext leads to authorization. This vulnerability is traded as CVE-2021-3656. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel (Operating System) (version now known). This issue affects some unknown processing of the component AMD KVM. The manipulation of the argument virt_ext with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability.

The weakness was shared 03/05/2022. The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2021-3656 since 07/21/2021. Technical details are known, but no exploit is available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

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

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Authorization
CWE: CWE-862 / CWE-863 / CWE-285
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

07/21/2021 🔍
03/05/2022 +227 days 🔍
03/05/2022 +0 days 🔍
03/09/2022 +4 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc
Status: Confirmed

CVE: CVE-2021-3656 (🔍)
GCVE (CVE): GCVE-0-2021-3656
GCVE (VulDB): GCVE-100-194249

Entryinfo

Created: 03/05/2022 04:51
Updated: 03/09/2022 09:36
Changes: 03/05/2022 04:51 (40), 03/09/2022 09:34 (2), 03/09/2022 09:36 (1)
Complete: 🔍
Cache ID: 216::103

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

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