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GNU LibreDWG EUVD-2026-31788

| CVE-2026-9529 LOW
NULL Pointer Dereference (CWE-476)
2026-05-26 VulDB GHSA-5ppw-fxgq-3w56
Denial Of Service Null Pointer Dereference Libredwg
1.9
CVSS 4.0 · NVD

Severity by source

NVD PRIMARY
1.9 LOW
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jun 08, 2026 - 13:01 vuln.today
CVSS changed
May 26, 2026 - 20:07 NVD
3.3 (LOW) 1.9 (LOW)

DescriptionCVE.org

A security flaw has been discovered in GNU LibreDWG up to 0.14. The affected element is the function match_BLOCK_HEADER of the file dwggrep.c of the component Dwggrep Utility. Performing a manipulation results in null pointer dereference. The attack requires a local approach. The exploit has been released to the public and may be used for attacks.

AnalysisAI

Null pointer dereference in GNU LibreDWG's dwggrep utility crashes the application when processing a maliciously crafted DWG file. The vulnerability resides in the match_BLOCK_HEADER function within dwggrep.c and affects all tracked releases from version 0.1 through 0.14. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Gain local OS access (PR:L)
Delivery
Place crafted DWG file on target system
Exploit
Invoke dwggrep against crafted file
Execution
Trigger null pointer dereference in match_BLOCK_HEADER
Impact
Crash dwggrep process (availability impact)
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Vulnerability AssessmentAI

Exploitation The attacker must have local access and low-level OS privileges (PR:L per CVSS vector) on the system where dwggrep is installed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Real-world risk is low. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A local user with standard account privileges places a crafted DWG file in a location processed by dwggrep - for example, in a shared directory monitored by an automated scan script. When dwggrep processes the file, match_BLOCK_HEADER dereferences a null pointer, causing the utility to crash and producing a denial of service for that process. …
Remediation No vendor-released patch has been identified at time of analysis - no fixed version is referenced in any advisory, CPE data, or the upstream GitHub issue #1247. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-31788 vulnerability details – vuln.today
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