CVE-2019-3863

A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used by the SSH client as an index to copy memory causing in an out of bounds memory write error.

CVSS 3.0

8.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

3.4% chance of exploitation in the next 30 days; higher than 88% of CVEs (scores of 2026-10-25)

CWEs

CWE-787, CWE-190

Published

2019-03-25

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• libssh2:libssh2
• netapp:ontap_select_deploy_administration_utility
• opensuse:leap
• redhat:enterprise_linux_desktop
• redhat:enterprise_linux_server
• redhat:enterprise_linux_server_aus
• redhat:enterprise_linux_server_eus
• redhat:enterprise_linux_server_tus
• redhat:enterprise_linux_workstation

References

• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
• https://access.redhat.com/errata/RHSA-2019:0679
• https://access.redhat.com/errata/RHSA-2019:1175
• https://access.redhat.com/errata/RHSA-2019:1652

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