CVE-2026-91752
GNU libextractor before 1.15 Stack Overflow via OLE2
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 15, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-789 Memory Allocation with Excessive Size Value
Affected Products
| Product | Versions |
|---|---|
libextractorGNU |
|
References
- https://github.com/Haitam-lazaar/libextractor-ole2-rceexploitthird-party-advisory
- https://git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.htmlpatch
- https://git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18422.htmlpatch
- https://www.gnu.org/software/libextractor/product
- VulnCheck Advisory: GNU libextractor before 1.15 Stack Overflow via OLE2third-party-advisory
- http://www.openwall.com/lists/oss-security/2026/09/16/16
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