Linux Kernel up to 5.6.11 btree.c btree_gc_coalesce input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.4$0-$5k0.00

A vulnerability was found in Linux Kernel up to 5.6.11 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function btree_gc_coalesce of the file drivers/md/bcache/btree.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails.

The weakness was shared 05/09/2020 (Website). The advisory is shared at lkml.org. This vulnerability is known as CVE-2020-12771 since 05/09/2020. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/10/2020).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries 154968, 154967 and 154966 are related to this item.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/09/2020 🔍
05/09/2020 +0 days 🔍
05/10/2020 +1 days 🔍
10/16/2020 +159 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lkml.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-12771 (🔍)
See also: 🔍

Entryinfo

Created: 05/10/2020 09:17
Updated: 10/16/2020 12:39
Changes: 05/10/2020 09:17 (41), 05/10/2020 09:22 (18), 10/16/2020 12:39 (1)
Complete: 🔍

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