CVE-2018-19870 Null dereference in n/a

What is CVE-2018-19870?

CVE-2018-19870 is a high-severity vulnerability in Debian Debian Linux, published on 26 Dec 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An issue was discovered in Qt before 5.11.3. A malformed GIF image causes a NULL pointer dereference in QGifHandler resulting in a segmentation fault.

Weakness: CWE-476

Which versions are affected by CVE-2018-19870?

It affects 3 products.

Products include Debian Debian Linux, Opensuse Leap, Qt Qt.

How do I fix CVE-2018-19870?

Upgrade to a fixed version.

Is CVE-2018-19870 being exploited?

There is no known exploitation of CVE-2018-19870 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• 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-2018-19870, GHSA-mv8h-q9cx-pf93, UBUNTU-CVE-2018-19870.