Linux Kernel up to 5.14.14 on PowerPC KVM Guest book3s_hv_rmhandlers.S denial of service

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 5.14.14 on PowerPC. This issue affects some unknown processing of the file arch/powerpc/kvm/book3s_hv_rmhandlers.S of the component KVM Guest Handler. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2021-43056. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.14.14 on PowerPC (Operating System). This affects some unknown functionality of the file arch/powerpc/kvm/book3s_hv_rmhandlers.S of the component KVM Guest Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was disclosed 10/28/2021. It is possible to read the advisory at cdn.kernel.org. This vulnerability is uniquely identified as CVE-2021-43056 since 10/28/2021. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 5.14.15 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.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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: Denial of service
CWE: CWE-404
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.14.15
Patch: git.kernel.org

Timelineinfo

10/28/2021 🔍
10/28/2021 +0 days 🔍
10/28/2021 +0 days 🔍
11/01/2021 +4 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: cdn.kernel.org
Status: Confirmed

CVE: CVE-2021-43056 (🔍)
GCVE (CVE): GCVE-0-2021-43056
GCVE (VulDB): GCVE-100-185607

Entryinfo

Created: 10/28/2021 13:14
Updated: 11/01/2021 10:55
Changes: 10/28/2021 13:14 (45), 11/01/2021 10:55 (1)
Complete: 🔍
Cache ID: 216::103

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