CVE-2022-31782

Code execution via unbounded character-map writes

Published May 27, 2022 · Updated Aug 3, 2024

Heap-based buffer overflow in FreeType Demo Programs through 2.12.1 allows local users to corrupt memory by processing a crafted font. The ftbench get_charset function allocates a character-code array for face->num_glyphs entries, then iterates a malformed character map without bounding the write count to that allocation. Exploitation requires a user to run ftbench on the crafted font; the resulting out-of-bounds writes can crash the benchmark or execute code in its process.

CVSS severity7.8
High
EPSS probability0.74%
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 FreeType Demo Programs through 2.12.1 allows local users to corrupt memory by processing a crafted font. The ftbench get_charset function allocates a character-code array for face->num_glyphs entries, then iterates a malformed character map without bounding the write count to that allocation. Exploitation requires a user to run ftbench on the crafted font; the resulting out-of-bounds writes can crash the benchmark or execute code in its process.

The record

CVE
CVE-2022-31782
Published
May 27, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 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

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/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.

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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