# CVE-2024-6409

## Summary

- **CVE ID:** CVE-2024-6409
- **Severity:** HIGH
- **CVSS Score:** 7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H)
- **CWE:** CWE-364
- **Published:** Jul 8, 2024
- **Last Modified:** Aug 21, 2026

## Description

A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote attacker does not authenticate within a set time period, then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server.

## Affected Products

- Red Hat — Red Hat Enterprise Linux 9 (0:8.7p1-38.el9_4.4)
- Red Hat — Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions (0:8.7p1-12.el9_0.3)
- Red Hat — Red Hat Enterprise Linux 9.2 Extended Update Support (0:8.7p1-30.el9_2.7)
- Red Hat — Red Hat OpenShift Container Platform 4.13 (413.92.202408122222-0)
- Red Hat — Red Hat OpenShift Container Platform 4.14 (414.92.202407300859-0)
- Red Hat — Red Hat OpenShift Container Platform 4.15 (415.92.202407301159-0)
- Red Hat — Red Hat OpenShift Container Platform 4.16 (416.94.202407171205-0)

## References

- [CNA](https://access.redhat.com/errata/RHSA-2024:4457)
- [CNA](https://access.redhat.com/errata/RHSA-2024:4613)
- [CNA](https://access.redhat.com/errata/RHSA-2024:4716)
- [CNA](https://access.redhat.com/errata/RHSA-2024:4910)
- [CNA](https://access.redhat.com/errata/RHSA-2024:4955)
- [CNA](https://access.redhat.com/errata/RHSA-2024:4960)
- [CNA](https://access.redhat.com/errata/RHSA-2024:5444)
- [CNA](https://access.redhat.com/security/cve/CVE-2024-6409)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2295085)
- [CVE](http://www.openwall.com/lists/oss-security/2024/07/08/2)
- [CVE](http://www.openwall.com/lists/oss-security/2024/07/09/2)
- [CVE](http://www.openwall.com/lists/oss-security/2024/07/09/5)
- [CVE](http://www.openwall.com/lists/oss-security/2024/07/10/1)
- [CVE](http://www.openwall.com/lists/oss-security/2024/07/10/2)
- [CVE](https://almalinux.org/blog/2024-07-09-cve-2024-6409/)
- [CVE](https://bugzilla.suse.com/show_bug.cgi?id=1227217)
- [CVE](https://explore.alas.aws.amazon.com/CVE-2024-6409.html)
- [CVE](https://github.com/openela-main/openssh/commit/c00da7741d42029e49047dd89e266d91dcfbffa0)
- [CVE](https://security-tracker.debian.org/tracker/CVE-2024-6409)
- [CVE](https://security.netapp.com/advisory/ntap-20240712-0003/)
- [CVE](https://sig-security.rocky.page/issues/CVE-2024-6409/)
- [CVE](https://ubuntu.com/security/CVE-2024-6409)
- [CVE](https://www.suse.com/security/cve/CVE-2024-6409.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 27.93%
- **EPSS Percentile:** 98.0

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._