CVE-2022-38171

Code execution via JBIG2 integer overflow

Published Aug 22, 2022 · Updated Sep 16, 2024

Integer overflow in Xpdf before 4.04 allows attackers to execute code or crash the process via a crafted PDF or JBIG2 image. JBIG2Stream::readTextRegionSeg() in JBIG2Stream.cc mishandles attacker-controlled region values, causing arithmetic wraparound during decoding. Exploitation requires opening or processing the malicious file, and the resulting impact is process crash or arbitrary code execution in the decoder's security context.

CVSS severity7.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Xpdf before 4.04 allows attackers to execute code or crash the process via a crafted PDF or JBIG2 image. JBIG2Stream::readTextRegionSeg() in JBIG2Stream.cc mishandles attacker-controlled region values, causing arithmetic wraparound during decoding. Exploitation requires opening or processing the malicious file, and the resulting impact is process crash or arbitrary code execution in the decoder's security context.

The record

CVE
CVE-2022-38171
Published
Aug 22, 2022
Updated
Sep 16, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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

7.8NVDCVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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