CVE-2022-35064Public exploitNetwork attack vector

Process crash via crafted font heap overflow

Published Sep 19, 2022 · Updated May 29, 2025

Heap buffer overflow in OTFCC commit 617837b allows remote attackers to crash otfccdump by supplying a crafted OpenType font file. A memory-fill operation reached during font parsing writes past the end of a heap allocation, with AddressSanitizer reporting __asan_memset. Exploitation requires a victim to process the malicious font; the documented consequence is a process crash, with no reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in OTFCC commit 617837b allows remote attackers to crash otfccdump by supplying a crafted OpenType font file. A memory-fill operation reached during font parsing writes past the end of a heap allocation, with AddressSanitizer reporting __asan_memset. Exploitation requires a victim to process the malicious font; the documented consequence is a process crash, with no reported data disclosure or modification.

The record

CVE
CVE-2022-35064
Published
Sep 19, 2022
Updated
May 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 29, 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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.5UbuntuCVSS: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.

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

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-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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