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TI-2021-16794 Aliases CVE-2021-39528GHSA-86j3-7436-wx4w

An issue was discovered in libredwg through v0.10.1.3751.

Priority MEDIUM 40CWE-415Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-415 and the CVSS impact.

Summary

An issue was discovered in libredwg through v0.10.1.3751. dwg_free_MATERIAL_private() in dwg.spec has a double free.

Why it matters now

EPSS 0.01077 65th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gnu:libredwg:*:*:*:*:*:*:*:*up to 0.10.1.3751VulnerableGNU
  • cpe:2.3:a:gnu:libredwg:*:*:*:*:*:*:*:* Versions up to 0.10.1.3751 Vulnerable ·GNU

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39528
  2. 2026-10-03 Alias added: GHSA-86j3-7436-wx4w

References

Exploit 1

  • TI-2023-18183 LibreDWG v0.12.5 was discovered to contain a heap buffer overflow via the function bit_calc_CRC at bits.c. CVSS 3.1HIGH 8.8
  • TI-2023-18182 LibreDWG v0.10 to v0.12.5 was discovered to contain a heap buffer overflow via the function bit_utf8_to_TU at bits.c. CVSS 3.1HIGH 8.8
  • TI-2023-18181 LibreDWG v0.10 to v0.12.5 was discovered to contain a heap buffer overflow via the function bit_wcs2nlen at bits.c. CVSS 3.1HIGH 8.8
  • TI-2023-10675 A heap-based buffer overflow vulnerability exits in GNU LibreDWG v0.12.5 via the bit_read_RC function at bits.c. CVSS 3.1HIGH 8.8
  • TI-2022-22309 LibreDWG v0.12.4.4643 was discovered to contain a heap buffer overflow via the function… CVSS 3.1HIGH 7.8
  • TI-2019-15128 An issue was discovered in GNU LibreDWG through 0.9.3. CVSS 3.1CRITICAL 9.8
See all 87 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences