CVE-2024-4141

Service interruption via optimized-away font bounds check

Published Apr 24, 2024 · Updated Aug 1, 2024

Out-of-bounds array write in Xpdf before 4.05 allows local users to interrupt PDF processing via an invalid Type 1 font. The character-code bounds check used while processing the font is optimized away by modern compilers, allowing an invalid code to index beyond the array. Triggering the write requires an affected binary to process a PDF containing the invalid font code, and the documented consequence is service interruption rather than data disclosure or modification.

CVSS severity2.9
Low
EPSS probability0.18%
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 array write in Xpdf before 4.05 allows local users to interrupt PDF processing via an invalid Type 1 font. The character-code bounds check used while processing the font is optimized away by modern compilers, allowing an invalid code to index beyond the array. Triggering the write requires an affected binary to process a PDF containing the invalid font code, and the documented consequence is service interruption rather than data disclosure or modification.

The record

CVE
CVE-2024-4141
Published
Apr 24, 2024
Updated
Aug 1, 2024
Vendor
Glyph & Cog, LLC
Product
Xpdf
Classifications
CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

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

  1. Affected versionversion=0 <4.05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Glyph & Cog, LLC · Xpdfversion=0 <4.05

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.9Glyph & Cog, LLCCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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