CVE-2026-91752: Memory Allocation with Excessive Size Value in GNU libextractor
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.
AI Analysis
Technical Summary
CVE-2026-91752 is a stack-based buffer overflow vulnerability in GNU libextractor prior to version 1.15. The vulnerability exists in the process_star_office function, which allocates a variable-length stack array sized from untrusted OLE2 stream data. An attacker can craft malicious StarOffice documents that cause the function to allocate up to 4 MB on the stack, leading to stack overflow and application crashes during metadata extraction.
Potential Impact
Exploitation of this vulnerability can cause denial of service by crashing any application that uses GNU libextractor to extract metadata from maliciously crafted StarOffice documents. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix is available in GNU libextractor version 1.15. Users should upgrade to version 1.15 or later to remediate this vulnerability. Patch status is confirmed by the affectedVersions data indicating versions before 1.15 are vulnerable.
CVE-2026-91752: Memory Allocation with Excessive Size Value in GNU libextractor
Description
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.
CVSS v4.0
Score 8.7high
Affected software
GNU
libextractor
pkg:github/gnunet/libextractorRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-91752 is a stack-based buffer overflow vulnerability in GNU libextractor prior to version 1.15. The vulnerability exists in the process_star_office function, which allocates a variable-length stack array sized from untrusted OLE2 stream data. An attacker can craft malicious StarOffice documents that cause the function to allocate up to 4 MB on the stack, leading to stack overflow and application crashes during metadata extraction.
Potential Impact
Exploitation of this vulnerability can cause denial of service by crashing any application that uses GNU libextractor to extract metadata from maliciously crafted StarOffice documents. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix is available in GNU libextractor version 1.15. Users should upgrade to version 1.15 or later to remediate this vulnerability. Patch status is confirmed by the affectedVersions data indicating versions before 1.15 are vulnerable.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-14T23:08:43.492Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa8958755bf5e2cf5e5478c
Added to database: 09/15/2026, 00:47:03 UTC
Last enriched: 09/15/2026, 01:01:26 UTC
Last updated: 09/15/2026, 03:10:32 UTC
Views: 8
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