Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oisf | Suricata | < 7.0.11 |
Related Weaknesses (CWE)
References
- https://github.com/OISF/suricata/commit/1d6d331752e933c46aca0ae7a9679b27462246e3Patch
- https://github.com/OISF/suricata/commit/7fa88ea9e7d05e07a7864050cfd836b576669720Patch
- https://github.com/OISF/suricata/security/advisories/GHSA-qrr7-crgj-cmh3PatchThird Party Advisory
FAQ
What is CVE-2025-53538?
CVE-2025-53538 is a vulnerability with a CVSS score of 7.5 (HIGH). 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, ...
How severe is CVE-2025-53538?
CVE-2025-53538 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-53538?
Check the references section above for vendor advisories and patch information. Affected products include: Oisf Suricata.