Linux Kernel up to 6.2.7 on x86-64bit nVMX nested.c nested_vmx_check_guest_state privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.2.7 on x86-64bit and classified as problematic. This vulnerability affects the function nested_vmx_check_guest_state of the file arch/x86/kvm/vmx/nested.c of the component nVMX. The manipulation leads to an unknown weakness. This vulnerability was named CVE-2023-30456. There is no exploit available. It is recommended to upgrade the affected component. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.2.7 on x86-64bit (Operating System). This affects the function nested_vmx_check_guest_state of the file arch/x86/kvm/vmx/nested.c of the component nVMX. The impact remains unknown. The summary by CVE is:

An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64 lacks consistency checks for CR0 and CR4.

The weakness was presented 04/10/2023 as 112e66017bff7f2837030f34c2bc19501e9212d5. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2023-30456 since 04/10/2023. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.2.8 or 6.3-rc3 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying the patch 112e66017bff7f2837030f34c2bc19501e9212d5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

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 6.2.8/6.3-rc3
Patch: 112e66017bff7f2837030f34c2bc19501e9212d5

Timelineinfo

04/10/2023 🔍
04/10/2023 +0 days 🔍
04/10/2023 +0 days 🔍
03/19/2025 +709 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 112e66017bff7f2837030f34c2bc19501e9212d5
Status: Confirmed

CVE: CVE-2023-30456 (🔍)
GCVE (CVE): GCVE-0-2023-30456
GCVE (VulDB): GCVE-100-225363

Entryinfo

Created: 04/10/2023 09:43
Updated: 03/19/2025 18:43
Changes: 04/10/2023 09:43 (46), 04/26/2023 12:47 (11), 03/19/2025 18:43 (20)
Complete: 🔍
Cache ID: 216:029:103

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