Out-of-bounds Read Affecting ruby3.3-fluentd-kubernetes-daemonset-1.18 package, versions <1.18.0.1.5-r4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-WOLFILATEST-RUBY33FLUENTDKUBERNETESDAEMONSET118-17671971
- published29 Jun 2026
- disclosed1 Jul 2026
Introduced: 29 Jun 2026
NewCVE-2026-54592 (opens in a new tab)How to fix?
Upgrade Wolfi ruby3.3-fluentd-kubernetes-daemonset-1.18 to version 1.18.0.1.5-r4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.3-fluentd-kubernetes-daemonset-1.18 package and not the ruby3.3-fluentd-kubernetes-daemonset-1.18 package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj::Doc#each_child, when invoked recursively over a deeply nested JSON document, overflows a fixed-size stack buffer and aborts the process, leading to DoS. In a two-step chain in ext/oj/fast.c, doc_each_child increments doc->where past the where_path[MAX_STACK = 100] array with no bounds check and never restores it (the doc->where-- is missing), so calling each_child recursively from inside the yield block drives doc->where beyond the array. On the next entry the function copies the path into the 800-byte stack-local buffer save_path[MAX_STACK] using wlen = doc->where - doc->where_path, so when the previous recursive call left doc->where past where_path[100] the wlen exceeds MAX_STACK and the memcpy overflows save_path on the C stack; because the Oj::Doc parser imposes no JSON nesting-depth limit (relying on a C-stack pressure check), deeply nested attacker input reaches this path. This issue has been fixed in version 3.17.3.