Linux Kernel up to 5.11.8 Character Device drivers/vhost/vdpa.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 5.11.8. Impacted is an unknown function of the file drivers/vhost/vdpa.c of the component Character Device Handler. Such manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2021-29266. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.11.8 (Operating System). Affected by this issue is an unknown part of the file drivers/vhost/vdpa.c of the component Character Device Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 03/27/2021. The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2021-29266. Technical details are known, but there is no available exploit.

Upgrading to version 5.11.9 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: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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 5.11.9
Patch: git.kernel.org

Timelineinfo

03/26/2021 🔍
03/27/2021 +1 days 🔍
03/27/2021 +0 days 🔍
04/06/2021 +10 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-29266 (🔍)
GCVE (CVE): GCVE-0-2021-29266
GCVE (VulDB): GCVE-100-171902

Entryinfo

Created: 03/27/2021 13:15
Updated: 04/06/2021 11:14
Changes: 03/27/2021 13:15 (43), 04/06/2021 11:07 (5), 04/06/2021 11:14 (18)
Complete: 🔍
Cache ID: 216::103

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