Out-of-bounds Read in Librecad Libdxfrw
CVE-2026-110606
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/LibreCAD/LibreCAD/issues/2554 (issue-tracking)
- hackmd.io/@haind-pwn/libdxfrw-dwg-header-oob-read (third-party-advisory)
- github.com/LibreCAD/libdxfrw/blob/LC2.2.0/src/intern/dwgreader18.cpp (technical-description)
- github.com/LibreCAD/LibreCAD/blob/v2.2.1.5/libraries/libdxfrw/src/intern/dwgrea… (technical-description)
- github.com/LibreCAD/libdxfrw/commit/0c5595930b20917a40ed7c188475eaca624b8ce9 (patch)
- github.com/LibreCAD/LibreCAD/commit/abd1f4a8e32dbd871c986086227502217200cd4b (patch)
- www.vulncheck.com/advisories/librecad-libdxfrw-through-lc2-2.0-stack-out-of-bou… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110606?
- CVE-2026-110606 is a low-severity vulnerability in Librecad Libdxfrw, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-10-14.
- How severe is CVE-2026-110606?
- Low severity. CVSS v3 base score is 3.3 out of 10.