CVE-2026-6039

MEDIUM

5.4

CVSS v4

Description

LibreOffice can import drawings in the DXF format used by CAD software. A heap buffer overflow existed when importing a DXF polyline. The point count taken from the file was truncated to a 16-bit value when the point buffer was sized, while the full count was used to fill it, so a polyline whose point count exceeded the 16-bit range was written past the end of the buffer. In fixed versions such oversized polylines are rejected.

CWE-197 CWE-787Out-of-bounds Write

How to fix

Remediation Available

libreofficeDebian

Fixed in:4:7.4.7-1+deb12u13CVE-2026-6039

Fixed in:4:25.2.3-2+deb13u5CVE-2026-6039

Fixed in:4:26.2.3.2-2CVE-2026-6039

libreofficeUbuntu

Fixed in:1:7.3.7-0ubuntu0.22.04.12USN-8534-1

Fixed in:4:24.2.7-0ubuntu0.24.04.6USN-8534-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v4 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

Impact

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Intelligence

0.16%probability of exploitation in 30 days

5thpercentile

Low risk: more likely to be exploited than 5% of all known CVEs.

References

Other references1

libreoffice.org

Related Vulnerabilities

Other CWE-197 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-42475	Critical	9.8	99%	KEV + Ransom	Fix
CVE-2025-6965	High	7.7	76%	-	Fix
CVE-2024-21310	High	7.8	12%	-	Fix
CVE-2024-43639	Critical	9.8	8.9%	-	Fix
CVE-2024-38125	High	7.8	5.9%	-	Fix
CVE-2024-28944	High	8.8	2.4%	-	Fix

Common questions

How do I fix CVE-2026-6039?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-6039 being actively exploited?

Not that we know of. CVE-2026-6039 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.16% is the estimated probability that it will be exploited in the next 30 days. That is higher than 5% of all scored CVEs.

How severe is CVE-2026-6039?

CVE-2026-6039 has a CVSS v4 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-6039 affect?

Published advisories record a fix for libreoffice (Debian), libreoffice (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.