Null Pointer Dereference in GNU libredwg Affects Layer Encoding Functionality
CVE-2026-90622

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Libredwg
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90622?

A security flaw in GNU libredwg 0.13.4 has been identified, primarily affecting the DWG_TABLE function within the Layer Encoding component. This vulnerability allows a local attacker to exploit a null pointer dereference, resulting in potential instability of the application. The issue is due to mismanaged handle dereferences in the code, specifically in the handling of material styles. To mitigate this risk, users are encouraged to upgrade to version 0.14, which introduces a patch that restores the integrity of material handling as per established coding conventions.

Affected Version(s)

libredwg 0.13.4

libredwg 0.14

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-2026-90622 - Proof of Concept

References

https://vuldb.com/vuln/403204
vdb-entrytechnical-description
https://vuldb.com/vuln/403204/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90622
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

lcyf-fizz (VulDB User)
.