CVE-2025-53538
7.5 · HIGHOverview
CVE-2025-53538 is a high-severity vulnerability affecting oisf suricata. It was published on July 22, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions 7.0.10 and below and 8.0.0-beta1 through 8.0.0-rc1, mishandling of data on HTTP2 stream 0 can lead to uncontrolled memory usage, leading to loss of visibility. Workarounds include disabling the HTTP/2 parser, and using a signature like drop http2 any any -> any any (frame:http2.hdr; byte_test:1,=,0,3; byte_test:4,=,0,5; sid: 1;) where the first byte test tests the HTTP2 frame type DATA and the second tests the stream id 0. This is fixed in versions 7.0.11 and 8.0.0.
Remediation
Check the references section for vendor advisories and patches from oisf. Update suricata to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| oisf | suricata | >= 0, < 7.0.11 | Affected |
Frequently Asked Questions
What is CVE-2025-53538?
CVE-2025-53538 is a high-severity vulnerability affecting oisf suricata. It was published on July 22, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-53538?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-53538?
Check the references section for vendor advisories and patches from oisf. Update suricata to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-53538?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-53538 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related HIGH CVEs from 2025
View all →HCL MyXalytics is affected by out-of-band resource load (HTTP) vulnerability. An attacker can deplo
The NextEPC MME <= 1.0.1 (fixed in commit a8492c9c5bc0a66c6999cb5a263545b32a4109df) contains a stack
A flaw was found in the Red Hat Advanced Cluster Security (RHACS) portal. When rendering a table vie
A Stored Cross-Site Scripting (XSS) vulnerability exists in the chat file upload functionality of op
A: Improper Neutralization of Input During Web Page Generation vulnerability in SUSE rancher allows
Mbed TLS before 3.6.4 allows a use-after-free in certain situations of applications that are develop
In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in re
Missing authorization in Ivanti Connect Secure before 22.7R2.9 or 22.8R2, Ivanti Policy Secure befor
Memory corruptions can be remotely triggered in the Control-M/Agent when SSL/TLS communication is co
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerab
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerab
An issue in Orban Optimod 5950, Optimod 5950HD, Optimod 5750, Optimod 5750HD, Optimod Trio Optimod v