CVE-2022-35164Public exploit

Invalid heap read via aliased chain reallocation

Published Aug 18, 2022 · Updated Aug 3, 2024

Heap use-after-free in LibreDWG 0.12.4.4608 allows attackers to trigger an invalid heap read by supplying a crafted DWG file. In bit_copy_chain, the source and destination can alias the same chain; growing the destination reallocates and frees that chain before bit_read_RC reads through the stale source pointer. The published proof of concept reaches the flaw through the local dwgrewrite utility, and no code-execution consequence is demonstrated.

CVSS severity9.8
Critical
EPSS probability1.02%
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 LibreDWG 0.12.4.4608 allows attackers to trigger an invalid heap read by supplying a crafted DWG file. In bit_copy_chain, the source and destination can alias the same chain; growing the destination reallocates and frees that chain before bit_read_RC reads through the stale source pointer. The published proof of concept reaches the flaw through the local dwgrewrite utility, and no code-execution consequence is demonstrated.

The record

CVE
CVE-2022-35164
Published
Aug 18, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1203
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 18, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

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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