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

Description

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.

Scores

EPSS (exploitation in 30 days)

0.52% · top 56% of all CVEs (5 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

• CWE-416: Use After Free (opens in a new tab)All about CWE-416 and its CVEs

Affected products

• OISF · suricata

  • affected >= 8.0.0, < 8.0.5

References (3)

• https://github.com/OISF/suricata/security/advisories/GHSA-qmc9-vqq2-8mv3 (opens in a new tab)x_refsource_CONFIRM
• https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 (opens in a new tab)x_refsource_MISC
• https://redmine.openinfosecfoundation.org/issues/8536 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-45752](https://trackcve.app/badge/CVE-2026-45752.svg)](https://trackcve.app/cve/CVE-2026-45752)

Record last updated 11 Sept 2026, 17:46 UTC.