Libssh: libssh: denial of service via unchecked proxycommand fork() failure
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.1%
exploitation probability
0.1%top 99% of all CVEs
observed exploitation
nono source reports it
A flaw was found in libssh. When ProxyCommand is used, an unchecked fork() failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service.
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
Affected products
Red Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat Hardened ImagesReferences
https://access.redhat.com/errata/RHSA-2026:42922https://access.redhat.com/errata/RHSA-2026:55855https://access.redhat.com/errata/RHSA-2026:62217https://access.redhat.com/errata/RHSA-2026:62218https://access.redhat.com/security/cve/CVE-2026-59845https://bugzilla.redhat.com/show_bug.cgi?id=2498178