CVE-2022-29694Public exploitNetwork attack vector

Embedding process crash via failed host allocation

Published May 27, 2022 · Updated Aug 3, 2024

NULL pointer dereference in Unicorn Engine 2.0.0-rc7 and earlier allows context-dependent attackers to crash an embedding process. An oversized uc_mem_map request can exhaust host virtual memory while guest allocation state persists, causing qemu_ram_free to remove a NULL RAMBlock during uc_close. Reachability requires control over the mapping size supplied to the library, and the demonstrated consequence is an abort of the embedding process.

CVSS severity7.5
High
EPSS probability1.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Unicorn Engine 2.0.0-rc7 and earlier allows context-dependent attackers to crash an embedding process. An oversized uc_mem_map request can exhaust host virtual memory while guest allocation state persists, causing qemu_ram_free to remove a NULL RAMBlock during uc_close. Reachability requires control over the mapping size supplied to the library, and the demonstrated consequence is an abort of the embedding process.

The record

CVE
CVE-2022-29694
Published
May 27, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
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

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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