Bug 2538443 (CVE-2026-57226)

Summary: CVE-2026-57226 Suricata: Suricata: Heap buffer overflow vulnerability leads to denial of service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Suricata, a network Intrusion Detection System (IDS). When the non-default SWF (Small Web Format) decompression feature is enabled with an unsafe decompression depth, a remote attacker can send a specially crafted SWF response. This can trigger a heap buffer overflow during HTTP SWF decompression, leading to a denial of service by crashing the Suricata engine.
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Bug Depends On: 2539181    
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Description OSIDB Bzimport 2026-09-22 18:34:13 UTC 
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, HTTP SWF decompression with the non-default swf-decompression feature and an unsafe decompress-depth can use the configured depth when allocating in src/util-file-decompression.c instead of limiting the allocation to the Flash file's actual data requirement. A crafted SWF response can therefore trigger an integer-related heap buffer overflow and crash Suricata; the default disabled feature and default depth are not affected. This issue is fixed in versions 8.0.6 and 7.0.17.