CVE-2023-51106Network attack vector

Process crash via zero component divisor

Published Dec 26, 2023 · Updated Aug 2, 2024

Divide-by-zero in PNM image parsing in Artifex MuPDF 1.23.4 allows attackers to crash the consuming process via a crafted file. The pnm_binary_read_image function divides SIZE_MAX by the component count returned by fz_colorspace_n during its row-size check, so a zero count raises a floating-point exception. Upstream analysis says pnm_read_image always supplies one or three components, making the claimed zero-count state unreachable and limiting the reported consequence to process termination if that invariant is bypassed.

CVSS severity7.5
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in PNM image parsing in Artifex MuPDF 1.23.4 allows attackers to crash the consuming process via a crafted file. The pnm_binary_read_image function divides SIZE_MAX by the component count returned by fz_colorspace_n during its row-size check, so a zero count raises a floating-point exception. Upstream analysis says pnm_read_image always supplies one or three components, making the claimed zero-count state unreachable and limiting the reported consequence to process termination if that invariant is bypassed.

The record

CVE
CVE-2023-51106
Published
Dec 26, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-369, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Application or System Exploitation

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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