CVE-2026-54898
Description
A flaw was found in Oj, a Ruby library designed for efficient JSON (JavaScript Object Notation) parsing. This vulnerability, a heap use-after-free, occurs when a specific function, called a callback, modifies the input JSON string during the parsing process. This action can lead to the program attempting to access memory that has already been freed, potentially causing the application to crash and resulting in 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)
Confidentiality
Technical Impact: Read Memory
If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
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