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Vulnerability · Published Apr 1, 2026 · Assigned by VulDB

CVE-2026-5314Nothings stb TTF File stb_truetype.h stbtt_InitFont_internal out-of-bounds

Medium 4.3

In plain English

A medium-severity out-of-bounds read in stb from Nothings. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.7%top 47.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A vulnerability was found in Nothings stb up to 1.26. Impacted is the function stbtt_InitFont_internal in the library stb_truetype.h of the component TTF File Handler. Performing a manipulation results in out-of-bounds read. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libstbno fix listedDEBIAN-CVE-2026-5314
Debian:13libstbno fix listedDEBIAN-CVE-2026-5314
Debian:14libstbno fix listedDEBIAN-CVE-2026-5314
Ubuntu:22.04:LTSlibstbno fix listedUBUNTU-CVE-2026-5314
Ubuntu:24.04:LTSlibstbno fix listedUBUNTU-CVE-2026-5314
Ubuntu:25.10libstbno fix listedUBUNTU-CVE-2026-5314
Ubuntu:26.04:LTSlibstbno fix listedUBUNTU-CVE-2026-5314
Ubuntu:26.10libstbno fix listedUBUNTU-CVE-2026-5314

Affected products (as reported)

VendorProductVersions
Nothings stb 1.01.11.21.31.41.51.61.7

Weakness: CWE-125, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

References