CVE-2026-54900
Description
A flaw was found in Oj, a Ruby gem for JSON parsing. When processing a specially crafted JSON object key of a specific length (65,535 bytes) in usual mode with create_id enabled, an integer truncation vulnerability occurs. This leads to a negative size being passed to the memcpy function, causing heap memory corruption and crashing the process. A remote attacker could exploit this to cause a denial of service.
Statement
Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected.
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Read Memory; Modify Memory
If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If the allocated buffer is smaller than expected, this could lead to an out-of-bounds read or write (CWE-119), possibly causing a crash, allowing arbitrary code execution, or exposing sensitive data.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
