CVE-2022-29693Public exploitNetwork attack vector

Memory exhaustion via unreleased invalid engine allocations

Published May 27, 2022 · Updated Aug 3, 2024

Memory leak in Unicorn Engine 2.0.0-rc7 and earlier allows attackers to consume process memory via an unsupported architecture value. The uc_open function allocates an engine object before validating its architecture, then returns UC_ERR_ARCH without freeing that object when init_arch remains unset. The condition requires consuming code to pass an invalid architecture identifier; repeated calls can exhaust memory, while closing the invalid handle can crash the process.

CVSS severity7.5
High
EPSS probability1.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Unicorn Engine 2.0.0-rc7 and earlier allows attackers to consume process memory via an unsupported architecture value. The uc_open function allocates an engine object before validating its architecture, then returns UC_ERR_ARCH without freeing that object when init_arch remains unset. The condition requires consuming code to pass an invalid architecture identifier; repeated calls can exhaust memory, while closing the invalid handle can crash the process.

The record

CVE
CVE-2022-29693
Published
May 27, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-401, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

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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