Medium severity · published May 9, 2020
CVE-2020-12771
An issue was discovered in the Linux kernel through 5.6.11
5.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
through 5.6.11 · source: NVD
AF
A700s Firmware · Netapp
All versions, or not specified · source: NVD
AI
Active IQ Unified Manager · Netapp
All versions, or not specified · source: NVD
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
ES
Element Software · Netapp
All versions, or not specified · source: NVD
HF
H300e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H300s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H410c Firmware · Netapp
All versions, or not specified · source: NVD
HF
H410s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H500e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H500s Firmware · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12771
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12771
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00071.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
Mailing List
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html
Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
Exploit
https://lkml.org/lkml/2020/4/26/87
More from Kernel
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
8.8
CVE-2013-6282
Linux Kernel Improper Input Validation Vulnerability
8.4
CVE-2022-0185
Linux Kernel Heap-Based Buffer Overflow Vulnerability
8.4
CVE-2013-2094
Linux Kernel Privilege Escalation Vulnerability