CVE-2022-47112Public exploit

Silent invalid-archive acceptance via unchecked stream flags

Published Apr 19, 2025 · Updated Apr 21, 2025

Improper XZ stream validation in 7-Zip 22.01 allows attackers to have a crafted archive accepted without an error. The XZDec.c parser fails to reject reserved bits in XZ stream flags and returns success instead of reporting the malformed header. Exploitation requires a user or local application to process the crafted file, causing invalid compressed data to be trusted silently by dependent workflows.

CVSS severity2.5
Low
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper XZ stream validation in 7-Zip 22.01 allows attackers to have a crafted archive accepted without an error. The XZDec.c parser fails to reject reserved bits in XZ stream flags and returns success instead of reporting the malformed header. Exploitation requires a user or local application to process the crafted file, causing invalid compressed data to be trusted silently by dependent workflows.

The record

CVE
CVE-2022-47112
Published
Apr 19, 2025
Updated
Apr 21, 2025
Vendor
7-Zip
Product
7-Zip
Classifications
CWE-754
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=22.01

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

7-Zip · 7-Zipversion=22.01

Published CVSS scores

2.5MITRECVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
3.3NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions

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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