CVE-2025-50949Public exploitNetwork attack vector

Service interruption via unreleased DlgCreate8 allocation

Published Oct 23, 2025 · Updated Oct 23, 2025

Memory leak in FontForge 20230101 and earlier allows remote attackers to interrupt service via a crafted font file opened by a user. DlgCreate8 retains a 40-byte string allocated by vsmprintf when _ReadSplineFont reports malformed input, rather than releasing it after constructing the error dialog. Opening the crafted file is required; repeated triggering accumulates unreleased memory and eventually interrupts the FontForge process.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in FontForge 20230101 and earlier allows remote attackers to interrupt service via a crafted font file opened by a user. DlgCreate8 retains a 40-byte string allocated by vsmprintf when _ReadSplineFont reports malformed input, rather than releasing it after constructing the error dialog. Opening the crafted file is required; repeated triggering accumulates unreleased memory and eventually interrupts the FontForge process.

The record

CVE
CVE-2025-50949
Published
Oct 23, 2025
Updated
Oct 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-401, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1204.002Malicious File

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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