high
7.1
CWE
120 119
Advisory Published
Updated

CVE-2021-42716: Buffer Overflow

First published: Thu Oct 21 2021(Updated: )

An issue was discovered in stb stb_image.h 2.27. The PNM loader incorrectly interpreted 16-bit PGM files as 8-bit when converting to RGBA, leading to a buffer overflow when later reinterpreting the result as a 16-bit buffer. An attacker could potentially have crashed a service using stb_image, or read up to 1024 bytes of non-consecutive heap data without control over the read location.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Nothings Stb Image.h=2.27
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Fedoraproject Fedora=35
=2.27
=33
=34
=35

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-42716?

    CVE-2021-42716 is a vulnerability in stb_image.h version 2.27 where the PNM loader incorrectly interprets 16-bit PGM files as 8-bit, leading to a buffer overflow.

  • What is the severity of CVE-2021-42716?

    The severity of CVE-2021-42716 is high with a CVSS score of 7.1.

  • How does CVE-2021-42716 affect software?

    CVE-2021-42716 affects software that uses stb_image.h version 2.27, including Nothings Stb Image.h and Fedora versions 33, 34, and 35.

  • What is the impact of CVE-2021-42716?

    The impact of CVE-2021-42716 is that an attacker could crash a service using stb_image or potentially execute arbitrary code.

  • How can I fix CVE-2021-42716?

    To fix CVE-2021-42716, it is recommended to update to a fixed version of stb_image.h and follow any provided patches or fixes.

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