Out-of-Bounds Read Vulnerability in Nothings stb TTF File Handler
CVE-2026-5315

5.3MEDIUM

Key Information:

Vendor

Nothings

Status
Stb
Vendor
CVE Published:
1 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5315?

A vulnerability exists in the Nothings stb library, specifically in the function stbtt__buf_get8 within the TTF File Handler component. This issue can be triggered by manipulating inputs, resulting in an out-of-bounds read condition. The nature of this vulnerability allows it to be exploited remotely, significantly increasing its risk profile. Despite early notification to the vendor regarding this issue, there has been no response or remediation provided, which raises concerns about the potential for widespread exploitation.

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Affected Version(s)

stb 1.0

stb 1.1

stb 1.2

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-2026-5315 - Proof of Concept

References

https://vuldb.com/vuln/354647
vdb-entrytechnical-description
https://vuldb.com/vuln/354647/cti
signaturepermissions-required
https://vuldb.com/submit/780559
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

d0razi (VulDB User)
VulDB
JSON
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