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Description

A weakness has been identified in GNU LibreDWG up to 0.14. Affected is the function bit_convert_TU of the file programs/dwggrep.c of the component Dwggrep Utility. This manipulation causes out-of-bounds read. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. Patch name: be996bf2178a40e98720f18c2414815d244413db. Applying a patch is the recommended action to fix this issue.

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




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

Problem types

Out-of-Bounds Read

Memory Corruption

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

github.com/LibreDWG/libredwg/issues/1246 exploit

vuldb.com/vuln/365486 (VDB-365486 | GNU LibreDWG Dwggrep Utility dwggrep.c bit_convert_TU out-of-bounds) vdb-entry technical-description

vuldb.com/vuln/365486/cti (VDB-365486 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/814261 (Submit #814261 | LibreDWG Project LibreDWG <= 0.14, main branch up to commit 6d6a339 (2026-04-10) Out-of-bounds Read (CWE-125)) third-party-advisory

github.com/LibreDWG/libredwg/issues/1246 issue-tracking

github.com/...redwg_6d6a339_heap_overflow_bit_convert_TU.dwg exploit

github.com/...ommit/be996bf2178a40e98720f18c2414815d244413db patch

www.gnu.org/ product

cve.org (CVE-2026-9504)

nvd.nist.gov (CVE-2026-9504)

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