Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck
CVE-2026-110606LibreCAD libdxfrw through LC2.2.0 Stack Out-of-Bounds Read via dwgReader18::readFileHeader
Low 3.3
In plain English
A low-severity out-of-bounds read in libdxfrw from LibreCAD. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | librecad | no fix listed | DEBIAN-CVE-2026-110606 |
| Debian:13 | librecad | no fix listed | DEBIAN-CVE-2026-110606 |
| Debian:14 | librecad | no fix listed | DEBIAN-CVE-2026-110606 |
| Ubuntu:22.04:LTS | librecad | no fix listed | UBUNTU-CVE-2026-110606 |
| Ubuntu:24.04:LTS | librecad | no fix listed | UBUNTU-CVE-2026-110606 |
| Ubuntu:26.04:LTS | librecad | no fix listed | UBUNTU-CVE-2026-110606 |
| Ubuntu:26.10 | librecad | no fix listed | UBUNTU-CVE-2026-110606 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- https://github.com/LibreCAD/LibreCAD/issues/2554 issue-tracking
- https://hackmd.io/@haind-pwn/libdxfrw-dwg-header-oob-read third-party-advisory
- https://github.com/LibreCAD/libdxfrw/blob/LC2.2.0/src/intern/dwgreader18.cpp#L248 technical-description
- https://github.com/LibreCAD/LibreCAD/blob/v2.2.1.5/libraries/libdxfrw/src/intern/dwgreader18.cpp#L248 technical-description
- https://github.com/LibreCAD/libdxfrw/commit/0c5595930b20917a40ed7c188475eaca624b8ce9 patch
- https://github.com/LibreCAD/LibreCAD/commit/abd1f4a8e32dbd871c986086227502217200cd4b patch
- VulnCheck Advisory: LibreCAD libdxfrw through LC2.2.0 Stack Out-of-Bounds Read via dwgReader18::readFileHeader third-party-advisory