Bug 2567819 (CVE-2026-97371)

Summary: CVE-2026-97371 ntopng: ntopng: Denial of Service via stack memory corruption from crafted network traffic
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: 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 ntopng. A remote, unauthenticated attacker on a monitored network segment can cause a Denial of Service (DoS) by sending network traffic that matches custom category inspection rules. This issue occurs because the application writes more data than allocated to stack memory during packet processing, causing memory corruption and resulting in an unexpected application crash.
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Description OSIDB Bzimport 2026-11-05 22:28:24 UTC 
ntopng is a web-based network traffic monitoring application. Prior to 6.7.260721, ndpi_get_custom_category_match writes a four-byte nDPI protocol-category value through a pointer to the two-byte id variable in IpAddress::reloadBlacklist in src/IpAddress.cpp during packet dissection and host initialization. A remote unauthenticated attacker on a monitored network segment can send packets that match custom-category rules, causing stack corruption and denial of service without user interaction. This issue is fixed in version 6.7.260721.