GNU LibreDWG up to 0.14 Dwggrep Utility dwggrep.c match_BLOCK_HEADER 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 categorized as problematic has been discovered in GNU LibreDWG up to 0.14. The impacted element is the function match_BLOCK_HEADER of the file dwggrep.c of the component Dwggrep Utility. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2026-9529. The attack requires local access. In addition, an exploit is available.

Detailsinfo

A vulnerability has been found in GNU LibreDWG up to 0.14 and classified as problematic. This vulnerability affects the function match_BLOCK_HEADER of the file dwggrep.c of the component Dwggrep Utility. 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-2026-9529. 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 vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31788). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: no mitigation known
Status: 🔍

0-Day Time: 🔒

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: 1247
Status: Confirmed

CVE: CVE-2026-9529 (🔒)
GCVE (CVE): GCVE-0-2026-9529
GCVE (VulDB): GCVE-100-365548
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/25/2026 21:44
Updated: 05/26/2026 09:45
Changes: 05/25/2026 21:44 (58), 05/26/2026 09:45 (1)
Complete: 🔍
Submitter: pwn3rd
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #814273: LibreDWG Project LibreDWG <= 0.14, main branch up to commit 6d6a339 (2026-04-10) NULL Pointer Dereference (CWE-476) (by pwn3rd)

Once again VulDB remains the best source for vulnerability data.

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