CVE-2019-5086: An exploitable integer overflow vulnerability exists in the flattenIncrementally function in the xcf2png and x

This week

HIGH 8.8WATCHLISTDOWNGRADEMITIGATE

CVE-2019-5086 is a high-severity flaw (CVSS 8.8) affecting xcftools, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-680, CWE-190, CWE-787
Published	2019-11-21
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: debian · xcftools project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-11-21 16:15 UTCPublished CVE record published
2026-06-17 02:37 UTCUpdated Record last modified

xcftools project xcftools DOWNGRADE

Affected: 1.0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.7

1. Check installed version

apt-cache policy xcftools || rpm -q xcftools || xcftools --version

2. No fixed release: DOWNGRADE to a release before 1.0.7 (Debian / Ubuntu)

apt-cache madison xcftools sudo apt install xcftools=<VERSION_BEFORE_1.0.7> sudo apt-mark hold xcftools

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xcftools sudo dnf downgrade xcftools-<VERSION_BEFORE_1.0.7> sudo dnf versionlock add xcftools

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-5086?

xcftools: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-5086 being exploited?

CVE-2019-5086 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-5086 affect?

CVE-2019-5086 affects xcftools, debian linux. Severity is high (CVSS 8.8). 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 c

How urgent is CVE-2019-5086?

Priority 63/100. High severity; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2019-5087 HIGH 8.8 DOWNGRADE MITIGATE An exploitable integer overflow vulnerability exists in the flattenIncrementally function in the xcf2png and x

References

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