CVE-2020-23319

Name: CVE-2020-23319
Creator: NVD / NIST
Published: 2021-06-10T23:15:08.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2020-23319 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. There is an Assertion in '(flags >> CBC_STACK_ADJUST_SHIFT) >= CBC_STACK_ADJUST_BASE || (CBC_STACK_ADJUST_BASE - (flags >> CBC_STACK_ADJUST_SHIFT)) <= context_p->stack_depth' in parser_emit_cbc_backward_branch in JerryScript 2.2.0.. EPSS estimates a 1.08% chance of exploitation in the next 30 days.

Description

There is an Assertion in '(flags >> CBC_STACK_ADJUST_SHIFT) >= CBC_STACK_ADJUST_BASE || (CBC_STACK_ADJUST_BASE - (flags >> CBC_STACK_ADJUST_SHIFT)) <= context_p->stack_depth' in parser_emit_cbc_backward_branch in JerryScript 2.2.0.

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

1.08%

61.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Jerryscript	Jerryscript	2.2.0

References

https://github.com/jerryscript-project/jerryscript/issues/3834Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/jerryscript-project/jerryscript/issues/3834Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jun 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-23319?

How severe is CVE-2020-23319?

CVE-2020-23319 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2020-23319?

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-2020-23319?

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

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Source: NVD / NIST