What’s Vulnerable › Vulnerabilities
CVE-2026-6045: Heap buffer overflow in EMF+ gradient brush import
- Severity: medium (CVSS 5.4 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-15 · updated 2026-10-25
- Weakness: CWE-190
Description
LibreOffice can import EMF+ graphics, which may be embedded in documents. A heap buffer overflow existed when importing an EMF+ gradient brush. The number of gradient blend points was read from the file and used to compute an allocation size, but that multiplication could overflow, so a small buffer was allocated and then filled as if it were large, writing past its end. In fixed versions the blend-point count is checked against the data actually available before allocating.
Affected products
- The Document Foundation LibreOffice: from 25.8 before < 25.8.7; from 26.2 before < 26.2.3 — fixed in < 25.8.7, < 26.2.3
How to fix
Upgrade to a fixed version: The Document Foundation LibreOffice < 25.8.7, < 26.2.3. Check the vendor advisory for mitigations.
In the news
References
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