VDB-165281 · CVE-2020-15436 · Nessus 208646

Linux Kernel up to 5.7 Error Field fs/block_dev.c use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 5.7. The affected element is an unknown function of the file fs/block_dev.c of the component Error Field Handler. The manipulation leads to use after free. This vulnerability is documented as CVE-2020-15436. The attack needs to be performed locally. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.7 (Operating System) and classified as problematic. This issue affects an unknown code of the file fs/block_dev.c of the component Error Field Handler. 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 availability.

The weakness was released 11/24/2020. The advisory is shared at lkml.org. The identification of this vulnerability is CVE-2020-15436. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 208646 (CentOS 7 : kernel-alt (RHSA-2021:0354)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.8 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208646). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 208646
Nessus Name: CentOS 7 : kernel-alt (RHSA-2021:0354)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.8

Timelineinfo

06/30/2020 🔍
11/24/2020 +147 days 🔍
11/24/2020 +0 days 🔍
10/12/2024 +1418 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lkml.org
Status: Confirmed

CVE: CVE-2020-15436 (🔍)
GCVE (CVE): GCVE-0-2020-15436
GCVE (VulDB): GCVE-100-165281

Entryinfo

Created: 11/24/2020 07:50
Updated: 10/12/2024 05:02
Changes: 11/24/2020 07:50 (41), 12/10/2020 03:29 (5), 12/10/2020 03:33 (18), 10/12/2024 05:02 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.