What’s Vulnerable › Vulnerabilities

CVE-2020-12771

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-05-09 · updated 2026-06-17
• Weakness: CWE-667

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 20.04
• Debian Linux: 9.0
• Linux kernel: through 5.6.11
• NetApp A700S Firmware: all versions
• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
• NetApp Cloud Backup: all versions
• NetApp Element Software: all versions
• NetApp H300E Firmware: all versions
• NetApp H300S Firmware: all versions
• NetApp H410C Firmware: all versions
• NetApp H410S Firmware: all versions
• NetApp H500E Firmware: all versions
• NetApp H500S Firmware: all versions
• NetApp H610C Firmware: all versions
• NetApp H610S Firmware: all versions
• NetApp H615C Firmware: all versions
• NetApp H700E Firmware: all versions
• NetApp H700S Firmware: all versions
• NetApp Hci Bootstrap Os: all versions
• NetApp Hci Management Node: all versions
• NetApp Solidfire: all versions
• NetApp Steelstore Cloud Integrated Storage: all versions
• openSUSE Leap: 15.1, 15.2
• Oracle Corporation SD-WAN Edge: 8.2

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00071.html
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
• https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
• https://lkml.org/lkml/2020/4/26/87
• https://security.netapp.com/advisory/ntap-20200608-0001/
• https://usn.ubuntu.com/4462-1/
• https://usn.ubuntu.com/4463-1/
• https://usn.ubuntu.com/4465-1/
• https://usn.ubuntu.com/4483-1/
• https://usn.ubuntu.com/4485-1/

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