GNU LibreDWG up to 0.14 DWG File src/decode.c dwg_next_entity null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GNU LibreDWG up to 0.14. Affected is the function dwg_next_entity of the file src/decode.c of the component DWG File Handler. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2026-9503. The attack needs to be launched locally. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in GNU LibreDWG up to 0.14 and classified as problematic. Affected by this vulnerability is the function dwg_next_entity of the file src/decode.c of the component DWG File Handler. 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 at github.com. This vulnerability is known as CVE-2026-9503. The exploitation appears to be easy. An attack has 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.

Upgrading eliminates this vulnerability. Applying the patch 8f03865f37f5d4ffd616fef802acc980be54d300 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.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31741). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

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Website

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: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Patch: 8f03865f37f5d4ffd616fef802acc980be54d300

Timelineinfo

05/25/2026 Advisory disclosed
05/25/2026 +0 days VulDB entry created
05/26/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: 1245
Status: Confirmed

CVE: CVE-2026-9503 (🔒)
GCVE (CVE): GCVE-0-2026-9503
GCVE (VulDB): GCVE-100-365485
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/25/2026 12:10
Updated: 05/26/2026 02:40
Changes: 05/25/2026 12:10 (61), 05/26/2026 02:40 (1)
Complete: 🔍
Submitter: pwn3rd
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #814260: LibreDWG Project LibreDWG <= 0.14, main branch up to commit 6d6a339 (2026-04-10) NULL Pointer Dereference (CWE-476) (by pwn3rd)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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