Vulnerability · Published May 26, 2026 · Assigned by VulDB
CVE-2026-9529GNU LibreDWG Dwggrep Utility dwggrep.c match_BLOCK_HEADER null pointer dereference
Low 3.3
In plain English
A low-severity null pointer dereference in LibreDWG from GNU. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.1%top 96.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-476, CWE-404 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
References
- VDB-365548 | GNU LibreDWG Dwggrep Utility dwggrep.c match_BLOCK_HEADER null pointer dereference vdb-entry, technical-description
- VDB-365548 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #814273 | LibreDWG Project LibreDWG <= 0.14, main branch up to commit 6d6a339 (2026-04-10) NULL Pointer Dereference (CWE-476) third-party-advisory
- https://github.com/LibreDWG/libredwg/issues/1247 issue-tracking
- https://github.com/HackC0der/CVE-Repos/blob/main/libredwg/libredwg_6d6a339_heap_oob_write_read_2004_compressed_section.dwg exploit
- https://www.gnu.org/ product