CVE-2026-6047— Heap buffer overflow in OOXML text box element import
Possible ATT&CK Techniques 1AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| The Document Foundation | LibreOffice | 25.8< < 25.8.7 | affected |
26.2< < 26.2.3 | affected |
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I. Basic Information for CVE-2026-6047
Vulnerability Information
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Vulnerability Title
Heap buffer overflow in OOXML text box element import
Source: NVD (National Vulnerability Database)
Vulnerability Description
LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
The Document Foundation LibreOffice 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
The Document Foundation LibreOffice是The Document Foundation的办公套件。 The Document Foundation LibreOffice存在缓冲区错误漏洞，该漏洞源于导入OOXML格式文档时堆缓冲区溢出，在重放文本框元素的延迟解析器事件时，处理程序对象类型假设错误导致写入超出分配内存边界。
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 |
|---|---|---|---|---|
| The Document Foundation | LibreOffice | 25.8 ~ < 25.8.7 | - |
II. Public POCs for CVE-2026-6047
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-6047 (1)
Same Patch Batch · The Document Foundation · 2026-06-15 · 7 CVEs total
| CVE-2026-6040 | Heap use-after-free in ODF number-format blank-width parsing | |
| CVE-2026-6039 | Heap buffer overflow in DXF polyline import | |
| CVE-2026-6045 | Heap buffer overflow in EMF+ gradient brush import | |
| CVE-2026-8358 | Heap buffer overflow in spreadsheet tracked-changes import | |
| CVE-2026-8356 | Stack buffer overflow in PPT presentation import | |
| CVE-2026-8357 | Heap buffer overflow in Calc formula compilation |
IV. Related Vulnerabilities
Same product: LibreOffice
- CVE-2026-8358
Heap buffer overflow in spreadsheet tracked-changes import - CVE-2026-8357
Heap buffer overflow in Calc formula compilation - CVE-2026-8356
Stack buffer overflow in PPT presentation import - CVE-2026-6045
Heap buffer overflow in EMF+ gradient brush import - CVE-2026-6040
Heap use-after-free in ODF number-format blank-width parsing
Same vendor: The Document Foundation
- CVE-2026-8358
Heap buffer overflow in spreadsheet tracked-changes import - CVE-2026-8357
Heap buffer overflow in Calc formula compilation - CVE-2026-8356
Stack buffer overflow in PPT presentation import - CVE-2026-6045
Heap buffer overflow in EMF+ gradient brush import - CVE-2026-6040
Heap use-after-free in ODF number-format blank-width parsing
Same weakness: CWE-787
- CVE-2026-49295
libde265 has an out-of-bounds write in process_reference_pic - CVE-2026-48773
ProxySQL pre-auth heap overflow in MySQL and PostgreSQL firs - CVE-2026-56211
Libaom: libaom: remote code execution via svc layer context - CVE-2026-56209
Libaom: libaom: arbitrary address write via svc layer contex - CVE-2026-8461
Heap out-of-bounds write via odd slice_height in FFmpeg Magi
V. Comments for CVE-2026-6047
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