CVE-2026-5315
Description
A flaw was found in Nothings stb. A remote attacker could exploit a vulnerability in the stbtt__buf_get8 function of the stb_truetype.h library by manipulating input. This could lead to an out-of-bounds read, potentially causing a denial of service (DoS) for affected systems.
Statement
This Moderate impact vulnerability in Nothings stb, specifically within the stb_truetype.h library's TTF file handling, could allow a remote attacker to trigger an out-of-bounds read. By manipulating input, an attacker could cause a denial of service on systems processing malicious TrueType Font files. This affects Red Hat Community Projects, including packages distributed via EPEL.
Mitigation
To mitigate this issue, avoid processing untrusted TrueType font files with applications that utilize the Nothings stb library. Restrict the sources of font files to trusted origins to prevent potential denial of service attacks.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
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