Allocation of Resources Without Limits or Throttling Affecting suricata package, versions <7.0.11>=8.0.0-beta1 <8.0.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jul 2025
- disclosed22 Jul 2025
- creditUnknown
Introduced: 22 Jul 2025
NewCVE-2025-53538 (opens in a new tab)How to fix?
Upgrade suricata to version 7.0.11, 8.0.0 or higher.
Overview
suricata is a network IDS, IPS and NSM engine developed by the OISF and the Suricata community.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the handling of HTTP/2 stream 0 data. An attacker can cause excessive memory consumption by sending specially crafted HTTP/2 traffic to exhaust system resources and disrupt service availability.
Workaround
This vulnerability can be mitigated by disabling the HTTP/2 parser or applying a signature such as 'drop http2 any any -> any any (frame:http2.hdr; byte_test:1,=,0,3; byte_test:4,=,0,5; sid: 1;)' to block malicious HTTP/2 frames.