Use After Free Affecting ruby3.4-fluentd-kubernetes-daemonset-1.19-kinesis package, versions <1.19.3.1.0-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.23% (12th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-RUBY34FLUENTDKUBERNETESDAEMONSET119KINESIS-18490077
  • published1 Aug 2026
  • disclosed30 Jul 2026

Introduced: 30 Jul 2026

CVE-2026-54522  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Minimos:latest ruby3.4-fluentd-kubernetes-daemonset-1.19-kinesis to version 1.19.3.1.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby3.4-fluentd-kubernetes-daemonset-1.19-kinesis package and not the ruby3.4-fluentd-kubernetes-daemonset-1.19-kinesis package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Buffer#clear in ext/msgpack/buffer.c leaves rmem_last, rmem_end, and rmem_owner stale after _msgpack_buffer_shift_chunk returns an rmem page to the shared pool, allowing a subsequent Buffer#write and a second MessagePack::Buffer to alias the page and disclose or corrupt cross-buffer data. This issue is fixed in version 1.8.2.

CVSS Base Scores

version 3.1