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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.

GNU libextractor是美国GNU基金会开源的一个元数据提取库。 GNU libextractor 1.15之前版本存在资源管理错误漏洞，该漏洞源于process_star_office函数根据攻击者控制的OLE2流数据确定变长栈数组大小，攻击者可构造恶意StarOffice文档在栈上分配最多4MB，造成栈缓冲区溢出，导致提取文档元数据的应用程序崩溃。

CVSS 7.5 · High EPSS 0.74% · P55

Possible ATT&CK Techniques 1 AI

T1204.001 · Malicious Link

Affected Version Matrix 1

VendorProduct Version RangeStatus
GNU libextractor < 1.15 affected
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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
Vulnerability Title
GNU libextractor 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU libextractor是美国GNU基金会开源的一个元数据提取库。 GNU libextractor 1.15之前版本存在资源管理错误漏洞，该漏洞源于process_star_office函数根据攻击者控制的OLE2流数据确定变长栈数组大小，攻击者可构造恶意StarOffice文档在栈上分配最多4MB，造成栈缓冲区溢出，导致提取文档元数据的应用程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNU libextractor 0 ~ 1.15 -

II. Public POCs for CVE-2026-91752

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III. Intelligence Information for CVE-2026-91752

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Patches & Fixes for CVE-2026-91752 (1)

Vendor Advisories for CVE-2026-91752 (1)

Exploits & Public PoCs for CVE-2026-91752 (1)

Vendor Pages for CVE-2026-91752 (1)

Same Patch Batch · GNU · 2026-09-15 · 5 CVEs total

CVE-2026-91779 3.3 LOW GNU Binutils Eh Frame elf-eh-frame.c _bfd_elf_eh_frame_section_offset null pointer derefer
CVE-2026-91780 3.3 LOW GNU Binutils elflink.c elf_link_add_object_symbols null pointer dereference
CVE-2026-91781 3.3 LOW GNU Binutils ELF Section elf64-x86-64.c elf_x86_64_common_section_index null pointer deref
CVE-2026-91782 3.3 LOW GNU Binutils Dynamic Relocation Allocation elfxx-x86.c elf_x86_allocate_dynrelocs null poi

IV. Related Vulnerabilities

Same product: libextractor
Same vendor: GNU
Same weakness: CWE-789