CVE-2018-5268 Out-of-bounds Write in OpenCV.

What is CVE-2018-5268?

CVE-2018-5268 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 8 Jan 2018. 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

In OpenCV 3.3.1, a heap-based buffer overflow happens in cv::Jpeg2KDecoder::readComponent8u in modules/imgcodecs/src/grfmt_jpeg2000.cpp when parsing a crafted image file.

Weakness: CWE-787

Which versions are affected by CVE-2018-5268?

6 open source packages ship an affected version, including opencv-contrib-python and opencv-python. It affects 2 products.

Products include Debian Debian Linux, Opencv Opencv.

How do I fix CVE-2018-5268?

Upgrade opencv-contrib-python to 3.4.1.15 or later.

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

Is CVE-2018-5268 being exploited?

There is no known exploitation of CVE-2018-5268 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2018-5268, GHSA-9g8h-pjm4-q92p, PYSEC-2026-2814, PYSEC-2026-705, UBUNTU-CVE-2018-5268.