CVE-2026-59845

EUVD-2026-46178
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
LOCAL
HIGH
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 1.11%
Affected Products (NVD)
VendorProductVersion
libsshlibssh
-
redhathardened_images
-
redhatenterprise_linux
8.0
redhatenterprise_linux
9.0
redhatenterprise_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libssh
bookworm
vulnerable
bookworm (security)
vulnerable
forky
0.12.2-1
fixed
sid
0.12.2-1
fixed
trixie
vulnerable
trixie (security)
0.11.5-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libssh
bionic
needs-triage
focal
needs-triage
jammy
Fixed 0.9.6-2ubuntu0.22.04.8
released
noble
Fixed 0.10.6-2ubuntu0.5
released
resolute
Fixed 0.11.3-1ubuntu2.1
released
xenial
needs-triage
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libssh-config
suse enterprise desktop 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise sap 12 SP5
0.9.8-3.24.1
fixed
suse enterprise sap 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise sap 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise server 12 SP5
0.9.8-3.24.1
fixed
suse enterprise server 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise server 15 SP7
0.9.8-150600.11.15.1
fixed
libssh-devel
suse enterprise desktop 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise sap 12 SP5
0.9.8-3.24.1
fixed
suse enterprise sap 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise sap 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise server 12 SP5
0.9.8-3.24.1
fixed
suse enterprise server 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise server 15 SP7
0.9.8-150600.11.15.1
fixed
libssh4
suse enterprise desktop 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise sap 12 SP5
0.9.8-3.24.1
fixed
suse enterprise sap 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise sap 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise server 12 SP5
0.9.8-3.24.1
fixed
suse enterprise server 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise server 15 SP7
0.9.8-150600.11.15.1
fixed
libssh4-32bit
suse enterprise desktop 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise sap 12 SP5
0.9.8-3.24.1
fixed
suse enterprise sap 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise sap 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise sap 15 SP7
0.9.8-150600.11.15.1
fixed
suse enterprise server 12 SP5
0.9.8-3.24.1
fixed
suse enterprise server 15 SP4
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP5
0.9.8-150400.3.20.1
fixed
suse enterprise server 15 SP6
0.9.8-150600.11.15.1
fixed
suse enterprise server 15 SP7
0.9.8-150600.11.15.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
libssh
Azure Linux 3.0
0:0.10.6-9.azl3
fixed
Common Weakness Enumeration
References
https://access.redhat.com/errata/RHSA-2026:42922
https://access.redhat.com/errata/RHSA-2026:55855
https://access.redhat.com/errata/RHSA-2026:62217
https://access.redhat.com/errata/RHSA-2026:62218
https://access.redhat.com/security/cve/CVE-2026-59845
https://bugzilla.redhat.com/show_bug.cgi?id=2498178