CVE-2026-59850

EUVD-2026-46266
A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leading to crashes or possible use-after-free conditions.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 27.46%
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-2026-59850
https://bugzilla.redhat.com/show_bug.cgi?id=2498183