CVE-2026-45752 Suricata detect/transform: use-after-free in decompress transforms
A use-after-free in Suricata's decompress transforms allows attackers to cause a denial of service via malicious rules.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45752?
CVE-2026-45752 is a medium-severity use after free vulnerability in Oisf Suricata, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-416
Which versions are affected by CVE-2026-45752?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2026-45752?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-45752 being exploited?
There is no known exploitation of CVE-2026-45752 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2026-45752, GHSA-qmc9-vqq2-8mv3, UBUNTU-CVE-2026-45752.