CVE-2022-33027Public exploit

Application crash via freed handle-reference dereference

Published Jun 22, 2022 · Updated Aug 3, 2024

Heap use-after-free in dwg_add_handleref in GNU LibreDWG 0.12.4.4608 allows attackers to crash applications via a crafted DWG file. During pre-R13 decoding, decode_preR13_header_variables frees a handle reference that dwg_add_handleref later dereferences while adding a block header. User interaction is required to supply the file; the demonstrated result is an AddressSanitizer abort, not proven code execution.

CVSS severity7.8
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap use-after-free in dwg_add_handleref in GNU LibreDWG 0.12.4.4608 allows attackers to crash applications via a crafted DWG file. During pre-R13 decoding, decode_preR13_header_variables frees a handle reference that dwg_add_handleref later dereferences while adding a block header. User interaction is required to supply the file; the demonstrated result is an AddressSanitizer abort, not proven code execution.

The record

CVE
CVE-2022-33027
Published
Jun 22, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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