Vulnerability in Red Hat Enterprise Linux 10

CVE-2024-6409

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.279 (98.0th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2024-6409: held from 0.279 to 0.279.

EPSS over last 30 days · oldest: 0.279 · newest: 0.279 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-6409?
CVE-2024-6409 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Signal Handler Race Condition. CVSS score: 7.0/10. Published 2024-07-08.
How severe is CVE-2024-6409?
High severity. CVSS v3 base score is 7.0 out of 10.
Is CVE-2024-6409 known to be exploited?
10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.