Bug 2535727 (CVE-2026-81872) - CVE-2026-81872 go.opentelemetry.io/otel/sdk/log: OpenTelemetry-Go: Denial of Service via attacker-driven log emission
Summary: CVE-2026-81872 go.opentelemetry.io/otel/sdk/log: OpenTelemetry-Go: Denial of ...
Keywords:
Status: NEW
Alias: CVE-2026-81872
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2536941 2536942 2536943 2536945 2536946 2536947 2536948 2536940 2536944
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-16 21:13 UTC by OSIDB Bzimport
Modified: 2026-09-18 09:46 UTC (History)
74 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-16 21:13:31 UTC
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the go.opentelemetry.io/otel/sdk/log BatchingProcessor can enter a tight CPU loop when attacker-driven log emission fills its asynchronous export buffer while the exporter is backpressured. NewBatchingProcessor wraps the exporter with newBufferExporter(exporter, 1), and the poll loop calls queue.TryDequeue and bufferExporter.EnqueueExport before immediately signaling pollTrigger whenever the queue remains at or above batchSize. Because a failed nonblocking EnqueueExport leaves the queue length unchanged, the processor repeatedly retries without waiting for its ticker, exhausting CPU and degrading or denying service in the embedding process. This issue is fixed in version 0.21.0.


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