CVE-2023-21066

Name: CVE-2023-21066
Creator: NVD / NIST
Published: 2023-06-28T18:15:13.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2023-21066 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In cd_CodeMsg of cd_codec.c, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

In cd_CodeMsg of cd_codec.c, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-250100597References: N/A

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.50%

39.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Google	Android	All versions

References

https://source.android.com/security/bulletin/pixel/2023-06-01Vendor Advisory
https://source.android.com/security/bulletin/pixel/2023-06-01Vendor Advisory

Timeline

Published: Jun 28, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21066?

How severe is CVE-2023-21066?

CVE-2023-21066 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21066?

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-2023-21066?

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

Scan your code now

Source: NVD / NIST