Service interruption via unbounded HTTP decompression
Published Nov 26, 2025 · Updated Nov 28, 2025
Resource exhaustion in Suricata 8.0.0 through 8.0.1 allows remote attackers to interrupt service with compressed HTTP traffic. The HTP BlockingCursor uses a growable Vec buffer, allowing decompressor writes to expand it indefinitely instead of stopping at the intended chunk capacity. The traffic must traverse a monitored HTTP flow with applicable decompression enabled; continued buffer growth exhausts sensor memory.
Summary
What happened
Resource exhaustion in Suricata 8.0.0 through 8.0.1 allows remote attackers to interrupt service with compressed HTTP traffic. The HTP BlockingCursor uses a growable Vec buffer, allowing decompressor writes to expand it indefinitely instead of stopping at the intended chunk capacity. The traffic must traverse a monitored HTTP flow with applicable decompression enabled; continued buffer growth exhausts sensor memory.
The record
- CVE
- CVE-2025-64334
- Published
- Nov 26, 2025
- Updated
- Nov 28, 2025
- Vendor
- Open Information Security Foundation
- Product
- Suricata
- Classifications
- CWE-770, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 26, 2025CVE publishedPublication date reported by the CVE source.
- Nov 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 8.0.0, < 8.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo