Memory Consumption Vulnerability in iperf3 by Red Hat
CVE-2026-71218

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
11 August 2026

What is CVE-2026-71218?

A flaw has been identified in iperf3 that permits a remote unauthenticated attacker to exploit the JSON_read() function. This function processes a peer-controlled message length, which can lead to unbounded memory allocation. The result is excessive memory consumption, causing a Denial of Service (DoS) scenario where the iperf3 service may experience severe slowdowns or even termination due to memory exhaustion.

References

https://access.redhat.com/security/cve/CVE-2026-71218
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2463003
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Found by AISLE in partnership with Red Hat.
.