CVE-2026-91752— GNU libextractor before 1.15 Stack Overflow via OLE2
Quick assessment
Affected
GNU libextractor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 GNU libextractor 1.15 之前版本中， 函数存在一个基于栈的缓冲区溢出漏洞。该函数会根据攻击者可控的 OLE2 流数据来分配一个变长的栈数组。攻击者可以构造恶意的 StarOffice 文档，使其在栈上分配多达 4MB 的空间，从而导致栈溢出，使任何从该文档中提取元数据的应用程序崩溃。
Possible ATT&CK Techniques 1 AI
T1204.001 · Malicious Link
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I. Basic Information for CVE-2026-91752
Vulnerability Information
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Vulnerability Title
GNU libextractor before 1.15 Stack Overflow via OLE2
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| GNU | libextractor | 0 ~ 1.15 | - |
|
II. Public POCs for CVE-2026-91752
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-91752 (1)
Vendor Advisories for CVE-2026-91752 (1)
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🔗 GNU libextractor before 1.15 Stack Overflow via OLE2 | Advisories | VulnCheck third-party-advisory
Exploits & Public PoCs for CVE-2026-91752 (1)
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🔗 GitHub - Haitam-lazaar/libextractor-ole2-rce: PoC for a Critical stack-based buffer overflow in GNU libextractor ≤ 1.14. A malicious .doc file triggers an unbounded VLA allocation causing unconditional DoS. In multi-threaded environments, it bypasses stack-clash protections for full RCE. · GitHub Read full article exploit third-party-advisory
Vendor Pages for CVE-2026-91752 (1)
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V. Comments for CVE-2026-91752
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