Linux Kernel up to 5.5.6 VT_RESIZEX null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 5.5.6. This impacts an unknown function. The manipulation of the argument VT_RESIZEX leads to null pointer dereference. This vulnerability is listed as CVE-2020-36558. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 5.5.6 (Operating System). This issue affects an unknown functionality. The manipulation of the argument VT_RESIZEX with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

A race condition in the Linux kernel before 5.5.7 involving VT_RESIZEX could lead to a NULL pointer dereference and general protection fault.

The weakness was presented 07/21/2022. The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2020-36558 since 07/21/2022. Technical details are known, but no exploit is available.

Upgrading to version 5.5.7 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.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.1
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: 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 5.5.7
Patch: git.kernel.org

Timelineinfo

07/21/2022 🔍
07/21/2022 +0 days 🔍
07/21/2022 +0 days 🔍
08/15/2022 +25 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-36558 (🔍)
GCVE (CVE): GCVE-0-2020-36558
GCVE (VulDB): GCVE-100-204653

Entryinfo

Created: 07/21/2022 08:01
Updated: 08/15/2022 16:00
Changes: 07/21/2022 08:01 (44), 08/15/2022 16:00 (11)
Complete: 🔍
Cache ID: 216::103

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