Null Pointer Dereference in GNU LibreDWG DWG File Handler
CVE-2026-9503

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Libredwg
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9503?

A security vulnerability exists in GNU LibreDWG up to version 0.14, specifically in the dwg_next_entity function within the DWG File Handler component. This flaw allows for a null pointer dereference, which could be exploited locally. The vulnerability was made public, increasing the risk of attacks. It is recommended to upgrade to the patched version identified by commit 8f03865f37f5d4ffd616fef802acc980be54d300 to mitigate potential risks.

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-2026-9503 - Proof of Concept

References

https://vuldb.com/vuln/365485
vdb-entrytechnical-description
https://vuldb.com/vuln/365485/cti
signaturepermissions-required
https://vuldb.com/submit/814260
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
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)
.