Use After Free Affecting ruby3.4-fluentd-kubernetes-daemonset-1.16 package, versions <1.16.11.1.0-r2
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-CHAINGUARDLATEST-RUBY34FLUENTDKUBERNETESDAEMONSET116-17686646
- published30 Jun 2026
- disclosed1 Jul 2026
Introduced: 30 Jun 2026
CVE-2026-54897 (opens in a new tab)How to fix?
Upgrade Chainguard ruby3.4-fluentd-kubernetes-daemonset-1.16 to version 1.16.11.1.0-r2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.4-fluentd-kubernetes-daemonset-1.16 package and not the ruby3.4-fluentd-kubernetes-daemonset-1.16 package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to 3.17.2, Oj::Doc iterators (each_value, each_child, each_leaf) were vulnerable to a heap use-after-free. When a Ruby block yielded during iteration calls doc.close or d.close, the document's heap memory is freed while the C iterator is still running. When control returns from the block, the iterator reads from the freed region, producing a use-after-free accessible from pure Ruby. This issue has been fixed in version 3.17.2.