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CVE-2026-110606— LibreCAD libdxfrw through LC2.2.0 Stack Out-of-Bounds Read via dwgReader18::readFileHeader

Quick assessment

Affected
LibreCAD libdxfrw
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.

LibreCAD 的 libdxfrw 模块（在 LibreCAD 2.2.0 及更高版本，直至 2.2.1.5 版本）中存在一个基于栈的越界读取漏洞，该漏洞位于 dwgReader18::readFileHeader() 函数中，原因是调用了 strlen 函数处理未以 NUL 字符结尾的缓冲区。攻击者可以构造一个特殊的 AC1018、AC1024 或 AC1027 格式的 DWG 文件，在其解密后的头部中不包含 NUL 字节，从而读取相邻的栈内存，并导致程序崩溃。

CVSS 3.3 · Low

Affected Version Matrix 2

VendorProduct Version RangeStatus
LibreCAD libdxfrw ≤ LC2.2.0 affected
LibreCAD LibreCAD ≤ 2.2.1.5 affected
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I. Basic Information for CVE-2026-110606

Vulnerability Information
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Vulnerability Title
LibreCAD libdxfrw through LC2.2.0 Stack Out-of-Bounds Read via dwgReader18::readFileHeader
Source: CVE Program / CVE List V5
Vulnerability Description
LibreCAD libdxfrw through LC2.2.0 (LibreCAD through 2.2.1.5) contains a stack-based out-of-bounds read vulnerability in dwgReader18::readFileHeader() caused by calling strlen on non-NUL-terminated buffers. Attackers can supply a crafted AC1018, AC1024 or AC1027 DWG file without NUL bytes in the decrypted header to read adjacent stack memory and crash the process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
LibreCAD libdxfrw 0 ~ LC2.2.0 -
LibreCAD LibreCAD 0 ~ 2.2.1.5 -

II. Public POCs for CVE-2026-110606

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III. Intelligence Information for CVE-2026-110606

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Patches & Fixes for CVE-2026-110606 (1)

Other References for CVE-2026-110606 (5)

IV. Related Vulnerabilities

Same weakness: CWE-125

V. Comments for CVE-2026-110606

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