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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.

PUBLISHED Reserved 2026-05-25 | Published 2026-05-26 | Updated 2026-05-26 | Assigner VulDB




MEDIUM: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
LOW: 3.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
1.7AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C

Problem types

NULL Pointer Dereference

Denial of Service

Product status

0.1
affected

0.2
affected

0.3
affected

0.4
affected

0.5
affected

0.6
affected

0.7
affected

0.8
affected

0.9
affected

0.10
affected

0.11
affected

0.12
affected

0.13
affected

0.14
affected

Timeline

2026-05-25:Advisory disclosed
2026-05-25:VulDB entry created
2026-05-25:VulDB entry last update

Credits

pwn3rd (VulDB User) reporter

References

vuldb.com/vuln/365548 (VDB-365548 | GNU LibreDWG Dwggrep Utility dwggrep.c match_BLOCK_HEADER null pointer dereference) vdb-entry technical-description

vuldb.com/vuln/365548/cti (VDB-365548 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/814273 (Submit #814273 | LibreDWG Project LibreDWG <= 0.14, main branch up to commit 6d6a339 (2026-04-10) NULL Pointer Dereference (CWE-476)) third-party-advisory

github.com/LibreDWG/libredwg/issues/1247 issue-tracking

github.com/...eap_oob_write_read_2004_compressed_section.dwg exploit

www.gnu.org/ product

cve.org (CVE-2026-9529)

nvd.nist.gov (CVE-2026-9529)

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