CVE-2024-56378Public exploitNetwork attack vector

Application crash via unchecked JBIG2 row addition

Published Dec 22, 2024 · Updated Nov 3, 2025

Out-of-bounds read in Poppler 24.12.0 and earlier allows attackers to crash PDF-processing applications with a malformed JBIG2 image. JBIG2Bitmap::combine adds the image-supplied y offset to each destination row without checking for signed overflow, then uses the wrapped result to derive a destination-buffer pointer. Processing a crafted PDF containing malformed JBIG2 data is required; the documented consequence is an application crash.

CVSS severity4.3
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Poppler 24.12.0 and earlier allows attackers to crash PDF-processing applications with a malformed JBIG2 image. JBIG2Bitmap::combine adds the image-supplied y offset to each destination row without checking for signed overflow, then uses the wrapped result to derive a destination-buffer pointer. Processing a crafted PDF containing malformed JBIG2 data is required; the documented consequence is an application crash.

The record

CVE
CVE-2024-56378
Published
Dec 22, 2024
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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