CVE-2020-12771 : An issue was discovered in the Linux kernel through 5.6.11. btree_gc

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.

Published 2020-05-09 21:15:11

Updated 2022-04-26 17:06:07

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2020-12771

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel
Versions up to, including, (<=) 5.6.11
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Oracle » Sd-wan Edge » Version: 8.2
cpe:2.3:a:oracle:sd-wan_edge:8.2:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 14.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 20.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Matching versions
Opensuse » Leap » Version: 15.1
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
Matching versions
Opensuse » Leap » Version: 15.2
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Matching versions
Netapp » Cloud Backup » Version: N/A
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
Matching versions
Netapp » Element Software » Version: N/A
cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*
Matching versions
Netapp » Steelstore Cloud Integrated Storage » Version: N/A
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
Matching versions
Netapp » Hci Management Node » Version: N/A
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
Matching versions
Netapp » Solidfire » Version: N/A
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
Matching versions
Netapp » Active Iq Unified Manager » Version: N/A For Vmware Vsphere
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
Matching versions
Netapp » H610s Firmware » Version: N/A
cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H610s » Version: N/A
Netapp » A700s Firmware » Version: N/A
cpe:2.3:o:netapp:a700s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » A700s » Version: N/A
Netapp » H410c Firmware » Version: N/A
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H410c » Version: N/A
Netapp » H300s Firmware » Version: N/A
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H300s » Version: N/A
Netapp » H500s Firmware » Version: N/A
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H500s » Version: N/A
Netapp » H700s Firmware » Version: N/A
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H700s » Version: N/A
Netapp » H300e Firmware » Version: N/A
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H300e » Version: N/A
Netapp » H500e Firmware » Version: N/A
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H500e » Version: N/A
Netapp » H700e Firmware » Version: N/A
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H700e » Version: N/A
Netapp » H410s Firmware » Version: N/A
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H410s » Version: N/A
Netapp » Hci Bootstrap Os » Version: N/A
cpe:2.3:o:netapp:hci_bootstrap_os:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » Hci Compute Node » Version: N/A
Netapp » H610c Firmware » Version: N/A
cpe:2.3:o:netapp:h610c_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H610c » Version: N/A
Netapp » H615c Firmware » Version: N/A
cpe:2.3:o:netapp:h615c_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H615c » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2020-12771

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 20 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-12771

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.9	MEDIUM	AV:L/AC:L/Au:N/C:N/I:N/A:C	3.9	6.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2020-12771

CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-12771

https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html

[SECURITY] [DLA 2420-2] linux regression update
Mailing List;Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/4483-1/

USN-4483-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html

[SECURITY] [DLA 2323-1] linux-4.19 new package
Mailing List;Third Party Advisory

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00071.html

Mailing List;Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/4462-1/

USN-4462-1: Linux kernel vulnerability | Ubuntu security notices | Ubuntu
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200608-0001/

May 2020 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product Security
Third Party Advisory

CVEs referencing this url
https://lkml.org/lkml/2020/4/26/87

LKML: Zhiqiang Liu: [PATCH V2] bcache: fix potential deadlock problem in btree_gc_coalesce
Exploit;Mailing List;Patch;Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html

Oracle Critical Patch Update Advisory - April 2021
Patch;Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/4463-1/

USN-4463-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

[SECURITY] [DLA 2420-1] linux security update
Mailing List;Third Party Advisory

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html

[security-announce] openSUSE-SU-2020:1153-1: important: Security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/4485-1/

USN-4485-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/4465-1/

USN-4465-1: linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2020-12771

Products affected by CVE-2020-12771

Exploit prediction scoring system (EPSS) score for CVE-2020-12771

CVSS scores for CVE-2020-12771

CWE ids for CVE-2020-12771

References for CVE-2020-12771