Out-of-Bounds Read Vulnerability in GNU LibreDWG Dwggrep Utility
CVE-2026-9504

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Libredwg
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9504?

A vulnerability has been found in the GNU LibreDWG's Dwggrep Utility within the function bit_convert_TU. This flaw causes an out-of-bounds read condition, which can potentially lead to local attacks. The exploit has been made publicly available, thus reinforcing the need for immediate action. The recommended solution is to apply the provided patch (be996bf2178a40e98720f18c2414815d244413db) to mitigate this risk and ensure system integrity.

Affected Version(s)

LibreDWG 0.1

LibreDWG 0.2

LibreDWG 0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-9504 - Proof of Concept

References

https://vuldb.com/vuln/365486
vdb-entrytechnical-description
https://vuldb.com/vuln/365486/cti
signaturepermissions-required
https://vuldb.com/submit/814261
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

pwn3rd (VulDB User)
.