Use After Free Affecting torvalds/linux package, versions [0,5.7-rc6)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
4.95% (90th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006656
  • published26 Jan 2022
  • disclosed11 Dec 2020
  • creditUnknown

Introduced: 11 Dec 2020

CVE-2020-27786  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.7-rc6 or higher.

Overview

Affected versions of this package are vulnerable to Use After Free. 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.

References

CVSS Base Scores

version 3.1