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CVE-2026-5315— Nothings stb TTF File stb_truetype.h stbtt__buf_get8 out-of-bounds

Quick assessment

Affected
Nothings stb
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

stb是Sean Barrett个人开发者的一个用于C/C++的stb单文件公共域库。 stb 1.26及之前版本存在缓冲区错误漏洞，该漏洞源于TTF File Handler组件stb_truetype.h库中stbtt__buf_get8函数的操作可能导致越界读取，可能导致远程攻击。

CVSS 4.3 · Medium EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5315

Vulnerability Information
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Vulnerability Title
Nothings stb TTF File stb_truetype.h stbtt__buf_get8 out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Nothings stb up to 1.26. The affected element is the function stbtt__buf_get8 in the library stb_truetype.h of the component TTF File Handler. Executing a manipulation can lead to out-of-bounds read. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
stb 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
stb是Sean Barrett个人开发者的一个用于C/C++的stb单文件公共域库。 stb 1.26及之前版本存在缓冲区错误漏洞，该漏洞源于TTF File Handler组件stb_truetype.h库中stbtt__buf_get8函数的操作可能导致越界读取，可能导致远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Nothings stb 1.0 -

II. Public POCs for CVE-2026-5315

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III. Intelligence Information for CVE-2026-5315

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Proof of Concept for CVE-2026-5315 (1)

Same Patch Batch · Nothings · 2026-04-01 · 3 CVEs total

CVE-2026-5313 4.3 MEDIUM Nothings stb GIF Decoder stb_image.h stbi__gif_load_next denial of service
CVE-2026-5314 4.3 MEDIUM Nothings stb TTF File stb_truetype.h stbtt_InitFont_internal out-of-bounds

IV. Related Vulnerabilities

Same product: stb
Same vendor: Nothings
Same weakness: CWE-125

V. Comments for CVE-2026-5315

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