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…

PriorityP341high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.43%

34.5th percentile

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
debian	suricata	< suricata 1:7.0.11-1 (forky)	suricata 1:7.0.11-1 (forky)
oisf	suricata	< 7.0.11	7.0.11
oisf	suricata	—	—
oisf	suricata	—	—
oisf	suricata	>= 0 < 1:7.0.10-1+deb13u1	1:7.0.10-1+deb13u1
oisf	suricata	>= 0 < 1:7.0.11-1	1:7.0.11-1

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv7.5HIGH

vendor_debian7.5HIGH

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