CVE-2026-54897
Description
A flaw was found in Oj (Optimized JSON), a Ruby gem for parsing JSON. This vulnerability, categorized as a heap use-after-free (CWE-416), occurs in the Oj::Doc iterators, specifically each_value, each_child, and each_leaf. An attacker could exploit this when a Ruby code block, executed during iteration, prematurely closes the document. This action frees the document's memory while the iterator is still active, leading to an attempt to access freed memory and potentially causing application instability or other unpredictable behavior.
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,Confidentiality,Availability
Technical Impact: Modify Application Data; Modify Memory; DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands
It may be possible to cause data corruption and possibly execute arbitrary code by modifying global variables or data structures at unexpected times, violating the assumptions of code that uses this global data.
Access Control
Technical Impact: Gain Privileges or Assume Identity
If a signal handler interrupts code that is executing with privileges, it may be possible that the signal handler will also be executed with elevated privileges, possibly making subsequent exploits more severe.
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