CVE-2026-59844

EUVD-2026-46179
A flaw was found in libssh. A remote authenticated client can issue SSH_FXP_READ requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 45.76%
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
0.11.5-0+deb13u1
fixed
trixie (security)
0.11.5-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libssh
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
resolute
Fixed 0.11.3-1ubuntu2.1
released
xenial
not-affected
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
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
libssh
RHEL 8
0:0.9.6-17.el8_10
fixed
RHEL 9
0:0.10.4-19.el9_8
fixed
libssh-config
RHEL 8
0:0.9.6-17.el8_10
fixed
RHEL 9
0:0.10.4-19.el9_8
fixed
libssh-devel
RHEL 8
0:0.9.6-17.el8_10
fixed
RHEL 9
0:0.10.4-19.el9_8
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libssh
Amazon Linux 2023
0:0.10.6-1.amzn2023.0.9
fixed
libssh-config
Amazon Linux 2023
0:0.10.6-1.amzn2023.0.9
fixed
libssh-debuginfo
Amazon Linux 2023
0:0.10.6-1.amzn2023.0.9
fixed
libssh-debugsource
Amazon Linux 2023
0:0.10.6-1.amzn2023.0.9
fixed
libssh-devel
Amazon Linux 2023
0:0.10.6-1.amzn2023.0.9
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-2026-59844
https://bugzilla.redhat.com/show_bug.cgi?id=2498177