CVE-2025-53538

highpriority · track · 0EPSS 0.005 · 45 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.54% (45th) EPSS

CVSS 7.5 · high

Is it mine?

14 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USCWE-770USCWE-770US

affected products (14)

Products and version ranges known to be affected.

OISF suricata≤ < 7.0.11enisa_euvdEU
OISF suricata8.0.0-beta1, → 8.0.0enisa_euvdEU
Fedora Project Fedora≤ 42fstec_bduRU
Fedora Project Fedora≤ 41fstec_bduRU
Fedora Project Fedora EPEL≤ epel8fstec_bduRU
Fedora Project Fedora EPEL≤ epel9fstec_bduRU
Open Information Security Foundation Suricata≤ 8.0.0fstec_bduRU
Open Information Security Foundation Suricata≤ 7.0.11fstec_bduRU
АО «Лаборатория Касперского» Kaspersky Industrial CyberSecurity for Networks≤ 4.0.1.222fstec_bduRU
АО «Лаборатория Касперского» Kaspersky Industrial CyberSecurity for Networks≤ 4.3.0.231fstec_bduRU
АО «НППКТ» ОСОН ОСнова 3 Оnyx≤ 3.2fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 13fstec_bduRU
oisf suricata< 7.0.11nvdUScpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
oisf suricata= 8.0.0nvdUScpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2025-07-22modified 2026-09-23

references (13)

External citations — patches, advisories, analysis.

scry

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