LibreDWG: excessive class-decoding reallocation in R13-R2000 DWG parsing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-62254
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 21:17:13 UTC
Updated2026-10-30 23:17:12 UTC
DescriptionLibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-400 | CWE-789 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-789 CWE-789: Memory Allocation with Excessive Size Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNADECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA LibreDWG Libredwg affected < 0.14 Not specified

References

ReferenceSourceLinkTags
github.com/LibreDWG/libredwg/issues/1261 [email protected] github.com
github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255 [email protected] github.com
github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f... [email protected] github.com
github.com/LibreDWG/libredwg/releases/tag/0.14 [email protected] github.com
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