Use After Free Affecting torvalds/linux package, versions [0,5.10-rc5)


Severity

Recommended
0.0
high
0
10

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

Threat Intelligence

EPSS
0.07% (21st percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006195
  • published26 Jan 2022
  • disclosed26 May 2021
  • creditUnknown

Introduced: 26 May 2021

CVE-2020-25669  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.10-rc5 or higher.

Overview

Affected versions of this package are vulnerable to Use After Free. A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

References

CVSS Base Scores

version 3.1