NULL pointer dereference in GNU Libredwg
CVE-2026-9529
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (4.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- GNU Libredwg — versions 0.1, 0.2, 0.3
Weakness classification (CWE)
References
- vuldb.com/vuln/365548 (technical-description, vdb-entry)
- vuldb.com/vuln/365548/cti (signature, permissions-required)
- vuldb.com/submit/814273 (third-party-advisory)
- github.com/LibreDWG/libredwg/issues/1247 (issue-tracking)
- github.com/HackC0der/CVE-Repos/blob/main/libredwg/libredwg_6d6a339_heap_oob_wri… (exploit)
- www.gnu.org/ (product)
Frequently asked questions
- What is CVE-2026-9529?
- CVE-2026-9529 is a low-severity vulnerability in GNU Libredwg, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-05-26.
- How severe is CVE-2026-9529?
- Low severity. CVSS v3 base score is 3.3 out of 10.