CVE-2020-23315

Name: CVE-2020-23315
Creator: NVD / NIST
Published: 2022-01-20T22:15:07.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.37%

Last modified Jun 17, 2026

CVE-2020-23315 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. There is an ASSERTION (pFuncBody->GetYieldRegister() == oldYieldRegister) failed in Js::DebugContext::RundownSourcesAndReparse in ChakraCore version 1.12.0.0-beta.. EPSS estimates a 2.37% chance of exploitation in the next 30 days.

Description

There is an ASSERTION (pFuncBody->GetYieldRegister() == oldYieldRegister) failed in Js::DebugContext::RundownSourcesAndReparse in ChakraCore version 1.12.0.0-beta.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.37%

81.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Microsoft	Chakracore	1.12.0.0	Beta

References

https://github.com/microsoft/ChakraCore/issues/6453Exploit, Issue Tracking, Third Party Advisory
https://github.com/microsoft/ChakraCore/issues/6453Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Jan 20, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-23315?

There is an ASSERTION (pFuncBody->GetYieldRegister() == oldYieldRegister) failed in Js::DebugContext::RundownSourcesAndReparse in ChakraCore version 1.12.0.0-beta.

How severe is CVE-2020-23315?

CVE-2020-23315 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.37% probability of exploitation in the next 30 days.

How do I fix CVE-2020-23315?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-23315?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST