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High severity7.5NVD Advisory· Published Jul 22, 2025· Updated Jun 17, 2026

CVE-2025-53538

CVE-2025-53538

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

5
  • Oisf/Suricatallm-fuzzy5 versions
    <=7.0.10, 8.0.0-beta1 through 8.0.0-rc1+ 4 more
    • (no CPE)range: <=7.0.10, 8.0.0-beta1 through 8.0.0-rc1
    • cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*range: <7.0.11
    • cpe:2.3:a:oisf:suricata:8.0.0:beta1:*:*:*:*:*:*
    • cpe:2.3:a:oisf:suricata:8.0.0:rc1:*:*:*:*:*:*
    • (no CPE)range: < 7.0.11

Patches

Vulnerability mechanics

References

3

News mentions

0

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