CVE-2026-5314 Nothings stb TTF File stb_truetype.h stbtt_InitFont_internal out-of-bounds
An out-of-bounds read in the stb TrueType library allows remote attackers to cause denial of service or disclose information via crafted TTF files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-5314?
CVE-2026-5314 is a medium-severity memory corruption vulnerability in Nothings stb, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Which versions are affected by CVE-2026-5314?
It affects 1 product.
Products include Nothings Stb Truetype.h.
How do I fix CVE-2026-5314?
No fix has been published for CVE-2026-5314 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-5314 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5314 exists.
Other vulnerabilities in Nothings stb
Sources
Also known as DEBIAN-CVE-2026-5314, GHSA-x46x-p265-r7jv, UBUNTU-CVE-2026-5314.