CVE-2020-27786

HIGH
7.8
CVSS Score
Published: December 11, 2020 at 04:05 AM UTC
Updated: June 17, 2026 at 03:09 AM UTC
7 products affected across 3 vendorsLinux KernelEnterprise LinuxOpenShift Container Platform

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Severity
HIGH7.8
Exploit prediction
EPSS 2%

Description

A flaw was found in the Linux kernel’s implementation of MIDI, where an attacker with a local account and the permissions to issue ioctl commands to midi devices could trigger a use-after-free issue. A write to this specific memory while freed and before use causes the flow of execution to change and possibly allow for memory corruption or privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.4.2244.10 ≤ v < 4.14.1814.15 ≤ v < 4.19.1244.20 ≤ v < 5.4.424.5 ≤ v < 4.9.2245.5 ≤ v < 5.6.14
Affected range stops below 4.14.181, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.124, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.224, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.224, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.6.14, so it looks safe — our inference, not a vendor statement
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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