CVE-2025-64334 Suricata is vulnerable to unbounded memory growth for decompression
Attackers can cause unbounded memory growth in Suricata via compressed HTTP data, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-64334?
CVE-2025-64334 is a high-severity denial of service vulnerability in Oisf Suricata, published on 26 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, compressed HTTP data can lead to unbounded memory growth during decompression. This issue has been patched in version 8.0.2. A workaround involves disabling LZMA decompression or limiting response-body-limit size.
Weakness: CWE-770
Which versions are affected by CVE-2025-64334?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2025-64334?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-64334 being exploited?
There is no known exploitation of CVE-2025-64334 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2025-64334, GHSA-r5jf-v2gx-gx8w, UBUNTU-CVE-2025-64334.