Home/CVE/An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadloc
CVE

CVE-2020-12771

An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadloc

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.

MEDIUM · CVSS 5.5 EPSS 0.00048
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-667Improper Locking
▤

Affected Products & Versions

24
linux kernel<= 5.6.11
debian linuxall versions
opensuse leapall versions
canonical ubuntu linuxall versions
netapp active iq unified managerall versions
netapp cloud backupall versions
netapp element softwareall versions
netapp hci management nodeall versions
⚠

Public Exploits & PoCs

1
poclkml.org · 26/87lkml.org
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 May 2020 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

22
suse-csafopenSUSE-SU-2021:0242-1
suse-csafSUSE-SU-2020:2487-1
usnUSN-4485-1
usnUSN-4483-1
suse-csafSUSE-SU-2020:2478-1
🔗

References & Sources

12
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00071.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20200608-0001/Third Party Advisory
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