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CVE-2026-9529— GNU LibreDWG Dwggrep Utility dwggrep.c match_BLOCK_HEADER null pointer dereference

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及之前版本存在代码问题漏洞，该漏洞源于Dwggrep Utility组件中dwggrep.c文件的match_BLOCK_HEADER函数操作不当，可能导致空指针取消引用。

CVSS 3.3 · Low EPSS 0.16% · P5

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-2026-9529

Vulnerability Information
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Vulnerability Title
GNU LibreDWG Dwggrep Utility dwggrep.c match_BLOCK_HEADER null pointer dereference
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in GNU LibreDWG up to 0.14. The affected element is the function match_BLOCK_HEADER of the file dwggrep.c of the component Dwggrep Utility. Performing a manipulation results in null pointer dereference. The attack requires a local approach. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
GNU LibreDWG 代码问题漏洞
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及之前版本存在代码问题漏洞，该漏洞源于Dwggrep Utility组件中dwggrep.c文件的match_BLOCK_HEADER函数操作不当，可能导致空指针取消引用。
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-2026-9529

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III. Intelligence Information for CVE-2026-9529

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Proof of Concept for CVE-2026-9529 (1)

Vendor Pages for CVE-2026-9529 (1)

Other References for CVE-2026-9529 (1)

Same Patch Batch · GNU · 2026-05-26 · 3 CVEs total

CVE-2026-9605 7.3 HIGH GNU libredwg Dwgbmp Utility bits.c bit_read_RC heap-based overflow
CVE-2026-9530 3.3 LOW GNU LibreDWG Dwgbmp Utility decode.c read_2004_compressed_section out-of-bounds

IV. Related Vulnerabilities

Same product: LibreDWG
Same vendor: GNU
Same weakness: CWE-476

V. Comments for CVE-2026-9529

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