Out-of-bounds Read Affecting ruby3.4-fluentd-kubernetes-daemonset-1.18 package, versions <1.18.0.1.5-r3
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-RUBY34FLUENTDKUBERNETESDAEMONSET118-17671954
- published29 Jun 2026
- disclosed1 Jul 2026
Introduced: 29 Jun 2026
NewCVE-2026-54500 (opens in a new tab)How to fix?
Upgrade Wolfi ruby3.4-fluentd-kubernetes-daemonset-1.18 to version 1.18.0.1.5-r3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.4-fluentd-kubernetes-daemonset-1.18 package and not the ruby3.4-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.load in :object mode reads uninitialized stack memory (and, for long keys, reads out of bounds) when parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surface to the caller, disclosing process stack memory. In ext/oj/intern.c, form_attr() handles the long-key path by allocating a heap buffer, b, populating it with the attribute name, and then freeing it — but it passed the uninitialized stack buffer buf (not b) to rb_intern3(). rb_intern3 therefore reads len + 1 bytes of uninitialized stack memory. When the key length is >= 256, it also reads out of bounds past the 256-byte buf. The resulting bytes are interned and can reach the caller via the produced Symbol or via the EncodingError message raised on invalid UTF-8, leaking process stack contents. This issue has been fixed in version 3.17.3.