Linux Kernel up to 5.9 ucma.c ctx_list/ucma_migrate_id use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.9. It has been rated as critical. Affected by this vulnerability is the function ctx_list/ucma_migrate_id of the file drivers/infiniband/core/ucma.c. This manipulation causes use after free. This vulnerability is tracked as CVE-2020-36385. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.9 (Operating System). It has been declared as critical. Affected by this vulnerability is the function ctx_list/ucma_migrate_id of the file drivers/infiniband/core/ucma.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 06/07/2021. It is possible to read the advisory at sites.google.com. This vulnerability is known as CVE-2020-36385. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 208560 (CentOS 7 : kpatch-patch (RHSA-2021:4798)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10 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.

The vulnerability is also documented in the vulnerability database at Tenable (208560). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

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

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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: 208560
Nessus Name: CentOS 7 : kpatch-patch (RHSA-2021:4798)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.10
Patch: git.kernel.org

Timelineinfo

06/07/2021 🔍
06/07/2021 +0 days 🔍
06/07/2021 +0 days 🔍
10/15/2024 +1226 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: sites.google.com
Status: Confirmed

CVE: CVE-2020-36385 (🔍)
GCVE (CVE): GCVE-0-2020-36385
GCVE (VulDB): GCVE-100-176407

Entryinfo

Created: 06/07/2021 21:34
Updated: 10/15/2024 19:08
Changes: 06/07/2021 21:34 (43), 06/10/2021 10:23 (5), 10/15/2024 19:08 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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