CVE-2026-8356 Details
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.
A stack buffer overflow vulnerability has been identified in LibreOffice when importing presentations in the legacy binary PPT format. This issue arises from improper handling of colour-replacement records, where two fixed-size colour tables were overwritten without resetting the write position. As a result, files with colour counts exceeding the table sizes could write past the end of the tables on the stack, potentially leading to arbitrary code execution. This vulnerability affects LibreOffice versions prior to 26.2.3/25.8.7.
Users can upgrade to LibreOffice versions 26.2.3, 25.8.7, or 24.2.5 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 15, 2026CISA-ADP
Assessed Jun 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.libreoffice.org/about-us/security/advisories/cve-2026-8356 | [email protected] | AdvisoryBundleVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| LibreOffice | < 26.2.3 (semver) < 25.8.7 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 15, 2026 | New CVE Received | [email protected] |