Bug 2567746 (CVE-2026-123203)

Summary: CVE-2026-123203 neuron: neuron: Denial of Service via crafted model dataset
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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 NEURON. A local attacker can cause a Denial of Service (DoS) and stack memory corruption by convincing a user or system to load a specially crafted model dataset containing oversized tokens. When the application parses these malformed data files, a stack-based buffer overflow occurs, crashing the process.
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Description OSIDB Bzimport 2026-11-05 22:22:54 UTC
NEURON (CoreNEURON) through 9.0.2 contains a stack buffer overflow vulnerability that allows attackers to corrupt stack memory by supplying over-long tokens in a crafted model dataset. Attackers can place oversized version or mechanism-name tokens in bbcore_mech.dat, globals.dat, or files.dat loaded by nrniv-core to crash the process.