Bug 2538307 (CVE-2026-83600)

Summary: CVE-2026-83600 netdata: Netdata: Denial of Service via oversized chart slot value
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Netdata. An authenticated child agent can send an oversized chart slot value, leading to an attempt to allocate a very large memory array. This allocation failure causes the parent Netdata agent to crash, resulting in a Denial of Service (DoS) by repeatedly disabling centralized monitoring.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2539377    
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Description OSIDB Bzimport 2026-09-22 17:56:06 UTC
Netdata is an open source observability tool. Prior to 2.10.4, an authenticated child agent can send an oversized CHART SLOT value that str2ull_encoded passes to pluginsd_rrdset_cache_put_to_slot in src/plugins.d/pluginsd_internals.h. The accepted slot drives reallocz to request an approximately 16 GiB chart-pointer array, and allocation failure invokes fatal and aborts the parent Netdata agent, repeatedly disabling centralized monitoring while stream access persists. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.