Integer Overflow or Wraparound Affecting torvalds/linux package, versions [,5.6.5)


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.07% (21st percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3004574
  • published26 Jan 2022
  • disclosed12 May 2020
  • creditUnknown

Introduced: 12 May 2020

CVE-2020-12826  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.6.5 or higher.

Overview

Affected versions of this package are vulnerable to Integer Overflow or Wraparound. A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.

References

CVSS Base Scores

version 3.1