Linux Kernel up to 5.11.11 SynIC Hyper-V arch/x86/kvm/hyperv.c synic_get null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.11.11 and classified as problematic. This affects the function synic_get of the file arch/x86/kvm/hyperv.c of the component SynIC Hyper-V. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2021-30178. There is no exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.11.11 (Operating System). It has been classified as problematic. Affected is the function synic_get of the file arch/x86/kvm/hyperv.c of the component SynIC Hyper-V. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability.

The weakness was shared 04/07/2021. The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2021-30178. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 247005 (Linux Distros Unpatched Vulnerability : CVE-2021-30178), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the vulnerability database at Tenable (247005). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 247005
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-30178

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

04/06/2021 🔍
04/07/2021 +1 days 🔍
04/07/2021 +0 days 🔍
08/10/2025 +1586 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-30178 (🔍)
GCVE (CVE): GCVE-0-2021-30178
GCVE (VulDB): GCVE-100-172554

Entryinfo

Created: 04/07/2021 13:22
Updated: 08/10/2025 03:13
Changes: 04/07/2021 13:22 (42), 04/11/2021 11:02 (5), 08/10/2025 03:13 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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