What is CVE-2025-53538?

CVE-2025-53538 is a high-severity vulnerability in Oisf Suricata, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-07-22.

How severe is CVE-2025-53538?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Oisf Suricata

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 c…

EPSS: 0.004 (62.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Oisf Suricata — versions < 7.0.11, >= 8.0.0-beta1, < 8.0.0

Weakness classification (CWE)

References

https://github.com/OISF/suricata/security/advisories/GHSA-qrr7-crgj-cmh3 (x_refsource_CONFIRM)
https://github.com/OISF/suricata/commit/1d6d331752e933c46aca0ae7a9679b27462246e3 (x_refsource_MISC)
https://github.com/OISF/suricata/commit/7fa88ea9e7d05e07a7864050cfd836b576669720 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-53538?: CVE-2025-53538 is a high-severity vulnerability in Oisf Suricata, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-07-22.
How severe is CVE-2025-53538?: High severity. CVSS v3 base score is 7.5 out of 10.