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Fencer Vulns
medium 4.7

CVE-2025-8114 json

Libssh: null pointer dereference in libssh kex session id calculation

published 2025-07-24 15 mo ago modified 2026-11-05 3 d ago also EUVD-2025-22513 , JLSEC-2025-99

cvss
4.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits
0
none known

Summary

A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an allocation failure in cryptographic functions may lead to a NULL pointer dereference. This issue can cause the client or server to crash.

Patch / fix

  • julia libssh_jll 0.11.3+0
  • Red Hat Red Hat Enterprise Linux 9 0:0.10.4-18.el9
  • libssh Debian 12 0.10.6-0+deb12u2
  • libssh Debian 13 0.11.2-1+deb13u1
  • libssh Debian 14 0.11.3-1

debian advisories DEBIAN-CVE-2025-8114

  • libssh Ubuntu 22.04 LTS 0.9.6-2ubuntu0.22.04.5
  • libssh Ubuntu 24.04 LTS 0.10.6-2ubuntu0.2
  • libssh Ubuntu 25.10 0.11.2-1ubuntu0.1
  • libssh Ubuntu Pro 16.04 LTS 0.6.3-4.3ubuntu0.6+esm3
  • libssh Ubuntu Pro 18.04 LTS 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm5
  • libssh Ubuntu Pro 20.04 LTS 0.9.3-2ubuntu2.5+esm2

ubuntu advisories UBUNTU-CVE-2025-8114

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libssh RHEL 9 0.10.4-18.el9
  • libssh-config RHEL 9 0.10.4-18.el9

red hat advisories RHSA-2026:18683

  • libssh SLE Micro 5.5, SLE Micro 5.4, SLE Micro 5.3 0.9.8-150400.3.12.1
  • libssh SLE Micro 5.2, SLE Micro 5.1 0.9.8-150200.13.12.1
  • libssh Linux Micro 6.1 0.10.6-slfo.1.1_3.1
  • libssh Linux Micro 6.0 0.10.6-3.1
  • libssh SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 0.9.8-150600.11.6.1
  • libssh SLES LTSS Extended Security 12 SP5 0.6.3-12.21.1
  • libssh SLES LTSS Extended Security 12 SP5 0.9.8-3.18.1

suse advisories SUSE-SU-2025:4408-1SUSE-SU-2025:3788-1SUSE-SU-2025:3787-1SUSE-SU-2025:20894-1SUSE-SU-2025:20847-1SUSE-SU-2025:03369-1

  • libssh openSUSE Tumbleweed 0.11.3-1.1

opensuse advisories openSUSE-SU-2025:15545-1

  • libssh AlmaLinux 9 0.10.4-18.el9
  • libssh-config AlmaLinux 9 0.10.4-18.el9

almalinux advisories ALSA-2026:18683

  • libssh Rocky Linux 9 0.10.4-18.el9

rocky linux advisories RLSA-2026:18683

  • libssh Alpine 3.24, Alpine 3.23 0.11.3-r0

alpine advisories ALPINE-CVE-2025-8114

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libssh CBL-Mariner 2.0, Azure Linux 3.0 0.10.6-5

azure linux advisories AZL-66255AZL-66267

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-8114 updated cvss 4.7

libssh: NULL Pointer Dereference in libssh KEX Session ID Calculation

  • Red Hat Enterprise Linux 8 libssh, libssh-config Red Hat Enterprise Linux 10 libssh Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 9) libssh-devel 0.10.4-18.el9, libssh-debuginfo 0.10.4-18.el9, libssh-debugsource 0.10.4-18.el9 Red Hat Enterprise Linux BaseOS (v. 9) libssh 0.10.4-18.el9, libssh-config 0.10.4-18.el9
    fixed: vendor fix RHSA-2026:18683
  • Red Hat Enterprise Linux 6 libssh2 Red Hat Enterprise Linux 7 libssh2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia libssh_jll
<0.11.3+0
0.11.3+0

Affected products

  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.