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CVE-2026-9504— GNU LibreDWG Dwggrep Utility dwggrep.c bit_convert_TU out-of-bounds

Quick assessment

Affected
GNU LibreDWG
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 LibreDWG是美国GNU社区的一个用于处理DWG文件的C语言库。 GNU LibreDWG 0.14版本及之前版本存在缓冲区错误漏洞，该漏洞源于Dwggrep Utility组件中programs/dwggrep.c文件的bit_convert_TU函数存在越界读取，可能导致本地攻击者利用该漏洞。

CVSS 3.3 · Low EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 14

VendorProduct Version RangeStatus
GNU LibreDWG 0.1 affected
0.2 affected
0.3 affected
0.4 affected
0.5 affected
0.6 affected
0.7 affected
0.8 affected
… +6 more rows
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I. Basic Information for CVE-2026-9504

Vulnerability Information
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Vulnerability Title
GNU LibreDWG Dwggrep Utility dwggrep.c bit_convert_TU out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in GNU LibreDWG up to 0.14. Affected is the function bit_convert_TU of the file programs/dwggrep.c of the component Dwggrep Utility. This manipulation causes out-of-bounds read. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. Patch name: be996bf2178a40e98720f18c2414815d244413db. Applying a patch is the recommended action to fix this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
GNU LibreDWG 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU LibreDWG是美国GNU社区的一个用于处理DWG文件的C语言库。 GNU LibreDWG 0.14版本及之前版本存在缓冲区错误漏洞，该漏洞源于Dwggrep Utility组件中programs/dwggrep.c文件的bit_convert_TU函数存在越界读取，可能导致本地攻击者利用该漏洞。
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 LibreDWG 0.1 cpe:2.3:a:gnu:libredwg:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9504

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III. Intelligence Information for CVE-2026-9504

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Patches & Fixes for CVE-2026-9504 (1)

Exploits & Public PoCs for CVE-2026-9504 (1)

Proof of Concept for CVE-2026-9504 (1)

Vendor Pages for CVE-2026-9504 (1)

Same Patch Batch · GNU · 2026-05-25 · 5 CVEs total

CVE-2026-9500 5.3 MEDIUM GNU LibreDWG Dwgread Utility decode.c read_2004_compressed_section heap-based overflow
CVE-2026-9502 5.3 MEDIUM GNU LibreDWG Dwgread Utility decode.c decompress_R2004_section heap-based overflow
CVE-2026-9501 3.3 LOW GNU LibreDWG Dwgread Utility decode.c decompress_R2004_section assertion
CVE-2026-9503 3.3 LOW GNU LibreDWG DWG File decode.c dwg_next_entity null pointer dereference

IV. Related Vulnerabilities

Same product: LibreDWG
Same vendor: GNU
Same weakness: CWE-125

V. Comments for CVE-2026-9504

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