Linux Kernel up to 5.18.16 x86 KVM Subsystem Privilege Escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.18.16 (Operating System). This affects an unknown part of the component x86 KVM Subsystem. The impact remains unknown. The summary by CVE is:

An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED situations.

The weakness was disclosed 09/02/2022. The advisory is shared at bugs.chromium.org. This vulnerability is uniquely identified as CVE-2022-39189 since 09/02/2022. Neither technical details nor an exploit are publicly available.

Upgrading to version 5.18.17 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.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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

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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 5.18.17
Patch: git.kernel.org

Timelineinfo

09/02/2022 🔍
09/02/2022 +0 days 🔍
09/02/2022 +0 days 🔍
10/11/2022 +39 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 6cd88243c7e03845a450795e134b488fc2afb736
Status: Confirmed

CVE: CVE-2022-39189 (🔍)

Entryinfo

Created: 09/02/2022 14:26
Updated: 10/11/2022 14:05
Changes: 09/02/2022 14:26 (41), 10/11/2022 13:59 (1), 10/11/2022 14:05 (11)
Complete: 🔍

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