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Ubuntu: libssh Moderate Crash Advisory USN-7849-1 CVE-2025-8114

ubuntu
Calendar Grey November 4, 2025
Dist Ubuntu Esm H88
libssh could cause crash vulnerabilities impacting multiple Ubuntu releases. Immediate updates are essential for security.
libssh could be made to crash.

Summary

libssh could be made to crash.

Software Description:

- libssh: A tiny C SSH library

Details:

Philippe Antoine discovered that libssh did not properly manage memory

when calculating a session id during the key exchange process. An attacker

could possibly use this issue to cause libssh to crash, resulting in a

denial of service.

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu memory issue libssh

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  libssh-4                        0.11.2-1ubuntu0.1

Ubuntu 25.04
  libssh-4                        0.11.1-1ubuntu0.2

Ubuntu 24.04 LTS
  libssh-4                        0.10.6-2ubuntu0.2
  libssh-gcrypt-4                 0.10.6-2ubuntu0.2

Ubuntu 22.04 LTS
  libssh-4                        0.9.6-2ubuntu0.22.04.5
  libssh-gcrypt-4                 0.9.6-2ubuntu0.22.04.5

Ubuntu 20.04 LTS
  libssh-4                        0.9.3-2ubuntu2.5+esm2
                                  Available with Ubuntu Pro
  libssh-gcrypt-4                 0.9.3-2ubuntu2.5+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libssh-4                        0.8.0~20170825.94fa1e38-1ubuntu0.7+esm5
                                  Available with Ubuntu Pro
  libssh-gcrypt-4                 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm5
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libssh-4                        0.6.3-4.3ubuntu0.6+esm3
                                  Available with Ubuntu Pro
  libssh-gcrypt-4                 0.6.3-4.3ubuntu0.6+esm3
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7849-1

CVE-2025-8114

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7849-1

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu memory issue libssh

Package Information

https://launchpad.net/ubuntu/+source/libssh/0.11.2-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libssh/0.11.1-1ubuntu0.2

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