CVE-2025-53538
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.
- Oisf Suricata
- < 7.0.11, 8.0.0
- Fix
- Available
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.4% (36th percentile)
- Weakness
- CWE-400, CWE-770
- NVD status
- Analyzed
- Published
- 2025-07-22
No indexed exploits for CVE-2025-53538 yet
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No exploit for CVE-2025-53538 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.