CVE-2026-63279 Out of bounds read in PICT image import
An out-of-bounds read in LibreOffice's PICT image importer allows attackers to cause crashes or leak memory by providing a crafted image with an invalid palette index.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-63279?
CVE-2026-63279 is a medium-severity memory corruption vulnerability in The Document Foundation LibreOffice, published on 22 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
LibreOffice can import PICT images, which may be embedded in documents. An out of bounds read existed when importing an image that uses a colour palette. The palette index held in the image data was used without being checked against the number of entries the palette has, so an index past the last entry read memory outside the palette. In fixed versions the palette index is limited to the entries present.
Weakness: CWE-125
Which versions are affected by CVE-2026-63279?
How do I fix CVE-2026-63279?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-63279 being exploited?
There is no known exploitation of CVE-2026-63279 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-63279, ECHO-088c-1462-ca4c, GHSA-v5cv-mqwj-8jgx, MINI-g295-55f8-2g9c, UBUNTU-CVE-2026-63279.