Integer Overflow Vulnerability in raysan5 raylib's LoadFontData Function
CVE-2025-15534

4.8MEDIUM

Key Information:

Vendor

Raysan5

Status
Raylib
Vendor
CVE Published:
18 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15534?

A vulnerability has been identified in the raysan5 raylib library, specifically within the LoadFontData function located in the src/rtext.c file. This vulnerability allows for an integer overflow, which can be exploited by an attacker operating from a local environment. The exploit is publicly available, making it imperative for users to apply the necessary patches to mitigate potential risks. The patch addressing this issue can be found in the commit 5a3391fdce046bc5473e52afbd835dd2dc127146.

Affected Version(s)

raylib 909f040

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-15534 - Proof of Concept

References

https://vuldb.com/?id.341706
vdb-entrytechnical-description
https://vuldb.com/?ctiid.341706
signaturepermissions-required
https://vuldb.com/?submit.733343
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
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