GNU libextractor up to 1.14 process_star_office buffer overflow

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GNU libextractor up to 1.14. Affected by this vulnerability is the function process_star_office. This manipulation causes buffer overflow. This vulnerability is handled as CVE-2026-91752. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in GNU libextractor up to 1.14 and classified as problematic. Affected by this vulnerability is the function process_star_office. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. The summary by CVE is:

GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-91752 since 09/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 1.15 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-78234). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• GNU

Name

• libextractor

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14

License

• open-source

Website

• Vendor: https://www.gnu.org/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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