CVE-2021-42716 Memory corruption in n/a

What is CVE-2021-42716?

CVE-2021-42716 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 21 Oct 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-120

Which versions are affected by CVE-2021-42716?

It affects 2 products.

Products include Fedoraproject Fedora, Nothings Stb Image.h.

How do I fix CVE-2021-42716?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-42716 being exploited?

There is no known exploitation of CVE-2021-42716 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-42716, GHSA-44mr-92xw-jfrv, UBUNTU-CVE-2021-42716, openSUSE-SU-2022:0018-1.