Linux Kernel up to 5.14-rc6 KVM int_ctl authorization

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 5.14-rc6. This affects an unknown part of the component KVM. Performing a manipulation of the argument int_ctl results in authorization. This vulnerability is reported as CVE-2021-3653. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.14-rc6 (Operating System). This affects an unknown code of the component KVM. The manipulation of the argument int_ctl with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 09/30/2021 as 1983686. The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2021-3653 since 07/19/2021. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239841 (TencentOS Server 4: kernel (TSSA-2024:0960)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.14-rc7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (239841). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.6
VulDB Temp Score: 7.3
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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Nessus ID: 239841
Nessus Name: TencentOS Server 4: kernel (TSSA-2024:0960)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.14-rc7

Timelineinfo

07/19/2021 🔍
09/30/2021 +73 days 🔍
09/30/2021 +0 days 🔍
06/20/2025 +1358 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 1983686
Status: Confirmed

CVE: CVE-2021-3653 (🔍)
GCVE (CVE): GCVE-0-2021-3653
GCVE (VulDB): GCVE-100-183537

Entryinfo

Created: 09/30/2021 06:45
Updated: 06/20/2025 01:31
Changes: 09/30/2021 06:45 (43), 10/03/2021 18:33 (1), 10/03/2021 18:39 (1), 06/20/2025 01:31 (16)
Complete: 🔍
Cache ID: 216::103

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

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