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TI-2024-21544 Aliases CVE-2024-32663

Suricata 's http2 parser contains an improper compressed header handling can lead to resource starvation

Priority LOW 35CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.5 and 6.0.19, a small amount of HTTP/2 traffic can lead to Suricata using a large amount of memory. The issue has been addressed in Suricata 7.0.5 and 6.0.19. Workarounds include disabling the HTTP/2 parser and reducing `app-layer.protocols.http2.max-table-size` value (default is 65536).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00956 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OISFsuricata7.0.0 – 7.0.4; 6.0.0 – 6.0.18—No fix listedCNA
  • suricata VendorOISF Affected 7.0.0 – 7.0.4; 6.0.0 – 6.0.18 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*6.0.0 to before 6.0.19; 7.0.0 to before 7.0.5VulnerableOISF
  • cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* Versions 6.0.0 to before 6.0.19; 7.0.0 to before 7.0.5 Vulnerable ·OISF

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-32663

References

Patch 4

Advisory 1

Other 2

  • TI-2026-33506 ikev2: unbounded client transform storage can lead to resource exhaustion CVSS 3.1HIGH 7.5
  • TI-2026-33484 Suricata lua/tls: null dereference in TlsGetCertInfo CVSS 3.1HIGH 7.5
  • TI-2024-31811 Suricata ja4: invalid alpn leads to panic CVSS 3.1HIGH 7.5
  • TI-2020-13673 Directory Traversal vulnerability found in Pfsense v.2.1.3 and Pfsense Suricata v.1.4.6… CVSS 3.1HIGH 7.5
  • TI-2023-17928 In Suricata before 6.0.13, an adversary who controls an external source of Lua rules may… CVSS 3.1CRITICAL 9.8
  • TI-2026-63304 Use after free in OISF Suricata CVSS 3.1CRITICAL 9.4
See all 99 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences