CVE-2019-5086 Integer overflow in xcftools

What is CVE-2019-5086?

CVE-2019-5086 is a high-severity vulnerability in Debian Debian Linux, published on 21 Nov 2019. 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 exploitable integer overflow vulnerability exists in the flattenIncrementally function in the xcf2png and xcf2pnm binaries of xcftools, version 1.0.7. An integer overflow can occur while walking through tiles that could be exploited to corrupt memory and execute arbitrary code. In order to trigger this vulnerability, a victim would need to open a specially crafted XCF file.

Weakness: CWE-787, CWE-190, CWE-680

Which versions are affected by CVE-2019-5086?

It affects 2 products.

Products include Debian Debian Linux, Xcftools Project Xcftools.

How do I fix CVE-2019-5086?

Apply the vendor's patch.

Is CVE-2019-5086 being exploited?

There is no known exploitation of CVE-2019-5086 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 GHSA-j44m-w6x3-678v, UBUNTU-CVE-2019-5086.