CVE-2024-6409
HIGH 7.0EPSS 27.9%
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.
- CVSS v3.1
- 7.0 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H - EPSS
- 27.93% chance of exploitation in the next 30 days, 98th percentile
- Published
- 2024-07-08
- Updated
- 2026-08-21