CVE-2025-15533Public exploit

Local memory corruption via unchecked atlas coordinates

Published Jan 18, 2026 · Updated Jan 18, 2026

Heap-based buffer overflow in GenImageFontAtlas in raysan5 raylib 909f040 allows local users to corrupt heap memory during font loading. GenImageFontAtlas copies glyph pixels into a heap-allocated atlas using computed coordinates without checking that each destination remains within the image buffer. Triggering the flaw requires local execution with crafted font data; the published reproducer demonstrates a one-byte write past the allocation and a process abort.

CVSS severity5.3
Medium
EPSS probability0.34%
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 GenImageFontAtlas in raysan5 raylib 909f040 allows local users to corrupt heap memory during font loading. GenImageFontAtlas copies glyph pixels into a heap-allocated atlas using computed coordinates without checking that each destination remains within the image buffer. Triggering the flaw requires local execution with crafted font data; the published reproducer demonstrates a one-byte write past the allocation and a process abort.

The record

CVE
CVE-2025-15533
Published
Jan 18, 2026
Updated
Jan 18, 2026
Vendor
raysan5
Product
raylib
Classifications
CWE-119, CWE-122
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 18, 2026Record 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=909f040

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

raysan5 · raylibversion=909f040

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.3VulDBAV:L/AC:L/Au:S/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122Heap-based Buffer Overflow

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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