CVE-2026-8356
Medium
Description
LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose combined colour counts exceeded the table size wrote past the end of the tables on the stack. In fixed versions the unused second pass is no longer read into those tables.
SeverityMedium
CVSS5.4
Exploit probability—
ProductLibreOffice
PublishedJun 15, 2026
First seenJun 15, 2026
Weakness typeCWE-787Out-of-bounds writeCWE-121CWE-121
How to fix
Update
- The Document Foundation LibreOffice< 26.2.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The Document Foundation LibreOffice | 26.2 ≤ v < < 26.2.4 | < 26.2.4 |
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