Fix search app buffer use-after-free (#143134)#143297
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ebarlas merged 1 commit intoelastic:9.2from Mar 2, 2026
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updateSearchApplication released a ReleasableBytesStreamOutput in a try-with-resources block while an async client.index() call still held a BytesReference view of its pages. The bug was latent until elastic#142451 switched the default buffer size to PAGE_SIZE_IN_BYTES, causing BigArrays to recycle pages instead of plain byte arrays. Freed pages were immediately reused, corrupting the IndexRequest source on replica nodes. Bind buffer release to the async listener via ActionListener.run and flush instead of close, matching AsyncTaskIndexService.
elasticsearchmachine
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v9.2.7
needs:triage
ebarlas
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:Security/Security
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This is a backport of the following commits from
mainto9.2: 755e020