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Suricata detect/transform: use-after-free in decompress transforms

CVSS 3.1 5.9 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-45752

Published

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, when certain detection transforms are chained, the decompress transform pipeline could read from an inspection buffer after it had been reallocated and freed. The issue is reached during network traffic processing, but requires a malicious rule as Suricata will crash whatever the traffic. Version 8.0.5 contains a fix. As a workaround, avoid rules that chain `gunzip` or `zlib_deflate` with `max-size` bigger than 4096 after another transform.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-45752

Published

suricata

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "OISF",
                    "product": "suricata",
                    "versions": [
                        {
                            "version": ">= 8.0.0, < 8.0.5",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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Sources read 14 Nov 23:34 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current