Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-6039— Heap buffer overflow in DXF polyline import

Quick assessment

Affected
The Document Foundation LibreOffice
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.

The Document Foundation LibreOffice是The Document Foundation的办公套件。 The Document Foundation LibreOffice存在数字错误漏洞，该漏洞源于导入DXF多段线时存在堆缓冲区溢出，文件中获取的点计数在确定点缓冲区大小时被截断为16位值，但填充时使用完整计数，导致点计数超过16位范围的多段线写入缓冲区末尾。

AI Predicted 8.6 Difficulty: Easy EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 2

VendorProduct Version RangeStatus
The Document Foundation LibreOffice 25.8< < 25.8.7 affected
26.2< < 26.2.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-6039

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Heap buffer overflow in DXF polyline import
Source: CVE Program / CVE List V5
Vulnerability Description
LibreOffice can import drawings in the DXF format used by CAD software. A heap buffer overflow existed when importing a DXF polyline. The point count taken from the file was truncated to a 16-bit value when the point buffer was sized, while the full count was used to fill it, so a polyline whose point count exceeded the 16-bit range was written past the end of the buffer. In fixed versions such oversized polylines are rejected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
The Document Foundation LibreOffice 数字错误漏洞
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存在数字错误漏洞，该漏洞源于导入DXF多段线时存在堆缓冲区溢出，文件中获取的点计数在确定点缓冲区大小时被截断为16位值，但填充时使用完整计数，导致点计数超过16位范围的多段线写入缓冲区末尾。
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-2026-6039

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-6039

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-6039 (1)

Same Patch Batch · The Document Foundation · 2026-06-15 · 7 CVEs total

CVE-2026-6040 5.4 MEDIUM Heap use-after-free in ODF number-format blank-width parsing
CVE-2026-6045 5.4 MEDIUM Heap buffer overflow in EMF+ gradient brush import
CVE-2026-8357 5.4 MEDIUM Heap buffer overflow in Calc formula compilation
CVE-2026-6047 Heap buffer overflow in OOXML text box element import
CVE-2026-8358 Heap buffer overflow in spreadsheet tracked-changes import
CVE-2026-8356 Stack buffer overflow in PPT presentation import

IV. Related Vulnerabilities

Same product: LibreOffice
Same vendor: The Document Foundation
Same weakness: CWE-787

V. Comments for CVE-2026-6039

No comments yet

Leave a comment