Linux Kernel up to 5.2.5 Fair Scheduler show_numa_stats use after free

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.2.5. It has been declared as critical. This impacts the function show_numa_stats of the component Fair Scheduler. Such manipulation leads to use after free. This vulnerability is documented as CVE-2019-20934. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.2.5 (Operating System) and classified as critical. Affected by this issue is the function show_numa_stats of the component Fair Scheduler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was released 11/28/2020. The advisory is shared for download at bugs.chromium.org. This vulnerability is handled as CVE-2019-20934. There are known technical details, but no exploit is available.

Upgrading to version 5.2.6 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.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

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

NVD Base Score: 2.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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 5.2.6
Patch: git.kernel.org

Timelineinfo

11/28/2020 🔍
11/28/2020 +0 days 🔍
11/28/2020 +0 days 🔍
12/11/2020 +13 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugs.chromium.org
Status: Confirmed

CVE: CVE-2019-20934 (🔍)
GCVE (CVE): GCVE-0-2019-20934
GCVE (VulDB): GCVE-100-165416

Entryinfo

Created: 11/28/2020 18:12
Updated: 12/11/2020 09:14
Changes: 11/28/2020 18:12 (43), 12/11/2020 09:12 (5), 12/11/2020 09:14 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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