GNU libredwg 0.13.4 Layer Encoding src/dwg.spec DWG_TABLE null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k2.03+

Summaryinfo

A vulnerability was found in GNU libredwg 0.13.4 and classified as problematic. Affected is the function DWG_TABLE of the file src/dwg.spec of the component Layer Encoding. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2026-90622. The attack can only be executed locally. Furthermore, there is an exploit available. It is suggested to upgrade the affected component. The FIELD_HANDLE macro itself is NULL-safe (emits null_handle) - only the two raw zeroing assignments added by 27118c40 ("encode: also disable LAYER.material") dereferenced a NULL material handle; the fix restores the file's existing if (_obj->style) guard convention for material.

Detailsinfo

A vulnerability has been found in GNU libredwg 0.13.4 and classified as problematic. This vulnerability affects the function DWG_TABLE of the file src/dwg.spec of the component Layer Encoding. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-90622. The exploitation appears to be easy. The attack needs to be approached locally. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The FIELD_HANDLE macro itself is NULL-safe (emits null_handle) - only the two raw zeroing assignments added by 27118c40 ("encode: also disable LAYER.material") dereferenced a NULL material handle; the fix restores the file's existing if (_obj->style) guard convention for material.

Upgrading to version 0.14 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch f5b548c4c1697d66c3dabd0f6a49280a14365a3a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: libredwg 0.14
Patch: f5b548c4c1697d66c3dabd0f6a49280a14365a3a

Timelineinfo

09/12/2026 Advisory disclosed
09/12/2026 +0 days VulDB entry created
09/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: 1269
Status: Confirmed

CVE: CVE-2026-90622 (🔒)
GCVE (CVE): GCVE-0-2026-90622
GCVE (VulDB): GCVE-100-403204
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/12/2026 22:32
Changes: 09/12/2026 22:32 (65)
Complete: 🔍
Submitter: lcyf-fizz
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #914770: GNU libredwg 0.13.4.8229 (git 9b4adcbf, 2026-06-01) NULL Pointer Dereference (by lcyf-fizz)

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