CVE-2024-25262Network attack vector

Process crash via undersized hdmx width allocation

Published Feb 20, 2024 · Updated Nov 3, 2025

Heap-based buffer overflow in TeX Live commit c515e allows remote attackers to crash ttfdump by supplying a crafted TTF file. ttfLoadHDMX allocates each Width buffer using the parsed hdmx size, then fread copies numGlyphs+1 bytes without verifying that the allocation is large enough. Processing the malicious font requires user interaction or an automated font-handling workflow; the confirmed consequence is a process crash.

CVSS severity8.1
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in TeX Live commit c515e allows remote attackers to crash ttfdump by supplying a crafted TTF file. ttfLoadHDMX allocates each Width buffer using the parsed hdmx size, then fread copies numGlyphs+1 bytes without verifying that the allocation is large enough. Processing the malicious font requires user interaction or an automated font-handling workflow; the confirmed consequence is a process crash.

The record

CVE
CVE-2024-25262
Published
Feb 20, 2024
Updated
Nov 3, 2025
Vendor
TeX Users Group
Product
TeX Live
Classifications
CWE-122, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 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?

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

  1. Affected versionversion=c515e

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TeX Users Group · TeX Liveversion=c515e

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1204.002Malicious File

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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