High [CVE-2026-70464] Denial of Service via handshake stall
This high-severity Red Hat Linux advisory covers CVE-2026-70464 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
Denial of Service via handshake stall. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-770.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 3 more.
Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4; Red Hat package: rsync.
- < 2.0.0
- < 3.5.0
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Disable the rsync daemon if unused (systemctl disable --now rsyncd), or strictly restrict TCP/873 access to trusted clients using firewall rules and hosts allow directives. Do not rely on standard module timeout settings, as they do not protect against this specific pre-handshake stall. While configuring system limits (TasksMax/LimitNOFILE) can prevent full host resource exhaustion, aggressive IP-based connection filtering is the only reliable way to keep the targeted rsync module available.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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