Vulnerability · Published Sep 9, 2026 · Assigned by mitre
CVE-2026-79515
Medium 4.3
In plain English
A medium-severity out-of-bounds read in the libstb package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.4%top 65.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An out-of-bounds read in the stbtt_GetGlyphShape component of nothings stb commit 31c1ad3 allows attackers to cause a Denial of Service (DoS) via sending a crafted TTF file.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libstb | no fix listed | DEBIAN-CVE-2026-79515 |
| Debian:13 | libstb | no fix listed | DEBIAN-CVE-2026-79515 |
| Debian:14 | libstb | no fix listed | DEBIAN-CVE-2026-79515 |
| Ubuntu:22.04:LTS | libstb | no fix listed | UBUNTU-CVE-2026-79515 |
| Ubuntu:24.04:LTS | libstb | no fix listed | UBUNTU-CVE-2026-79515 |
| Ubuntu:26.04:LTS | libstb | no fix listed | UBUNTU-CVE-2026-79515 |
| Ubuntu:26.10 | libstb | no fix listed | UBUNTU-CVE-2026-79515 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:R