CVE-2021-43086

Name: CVE-2021-43086
Creator: NVD / NIST
Published: 2022-02-28T15:15:07.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2021-43086 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. ARM astcenc 3.2.0 is vulnerable to Buffer Overflow. When the compression function of the astc-encoder project with -cl option was used, a stack-buffer-overflow occurred in function encode_ise() in function compress_symbolic_block_for_partition_2planes() in "/Source/astcenc_compress_symbolic.cpp".. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

ARM astcenc 3.2.0 is vulnerable to Buffer Overflow. When the compression function of the astc-encoder project with -cl option was used, a stack-buffer-overflow occurred in function encode_ise() in function compress_symbolic_block_for_partition_2planes() in "/Source/astcenc_compress_symbolic.cpp".

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

1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Arm	Adaptive Scalable Texture Compression Encoder	3.2.0

References

https://github.com/ARM-software/astc-encoder/issues/296.Broken Link, Exploit, Issue Tracking, Third Party Advisory
https://github.com/ARM-software/astc-encoder/issues/296.Broken Link, Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Feb 28, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43086?

How severe is CVE-2021-43086?

CVE-2021-43086 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43086?

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-2021-43086?

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

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Source: NVD / NIST