Linux Kernel KVM virt/kvm/kvm_main.c kvm_vcpu_init vcpu null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel. Affected by this issue is the function kvm_vcpu_init of the file virt/kvm/kvm_main.c of the component KVM. Executing a manipulation of the argument vcpu can lead to null pointer dereference. This vulnerability is registered as CVE-2022-1263. The attack needs to be launched locally. No exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (affected version unknown) and classified as problematic. This vulnerability affects the function kvm_vcpu_init of the file virt/kvm/kvm_main.c of the component KVM. The manipulation of the argument vcpu with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service.

The weakness was published 09/01/2022 as 5593473a1e6c743764b08e3b6071cb43b5cfa6c4. The advisory is available at github.com. This vulnerability was named CVE-2022-1263 since 04/06/2022. Technical details are known, but there is no available exploit.

Applying the patch 5593473a1e6c743764b08e3b6071cb43b5cfa6c4 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 5593473a1e6c743764b08e3b6071cb43b5cfa6c4

Timelineinfo

04/06/2022 🔍
09/01/2022 +148 days 🔍
09/01/2022 +0 days 🔍
10/10/2022 +39 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 5593473a1e6c743764b08e3b6071cb43b5cfa6c4
Status: Confirmed

CVE: CVE-2022-1263 (🔍)
GCVE (CVE): GCVE-0-2022-1263
GCVE (VulDB): GCVE-100-207670

Entryinfo

Created: 09/01/2022 15:00
Updated: 10/10/2022 14:58
Changes: 09/01/2022 15:00 (45), 10/10/2022 14:58 (10)
Complete: 🔍
Cache ID: 216::103

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