Information Exposure Affecting torvalds/linux package, versions [,5.8.0)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.1% (29th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005288
  • published26 Jan 2022
  • disclosed16 Sept 2020
  • creditUnknown

Introduced: 16 Sep 2020

CVE-2020-10781  (opens in a new tab)
CWE-732  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.8.0 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable.

References

CVSS Base Scores

version 3.1