CVE-2022-23318Public exploit

Crash and memory disclosure via unchecked PCF read

Published Feb 17, 2022 · Updated Aug 3, 2024

Heap-buffer overflow in pcf2bdf before 1.07 allows local users to crash the converter or expose program memory via a crafted PCF font. In pcf2bdf.cc main, malformed input causes a 40-byte read from a one-byte heap allocation without validation that sufficient data remains. Exploitation requires a user or calling process to pass the crafted font to the local command-line converter; no network service is exposed.

CVSS severity7.1
High
EPSS probability0.79%
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 pcf2bdf before 1.07 allows local users to crash the converter or expose program memory via a crafted PCF font. In pcf2bdf.cc main, malformed input causes a 40-byte read from a one-byte heap allocation without validation that sufficient data remains. Exploitation requires a user or calling process to pass the crafted font to the local command-line converter; no network service is exposed.

The record

CVE
CVE-2022-23318
Published
Feb 17, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
7.1UbuntuCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:P

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 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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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