CVE-2019-3863A flaw was found in libssh2 before 1.8.1 creating a vulnerability on the SSH client side.
Updated under an hour ago ()
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It affects The libssh2 Project libssh2 and 13 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.0, CNA)CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
The libssh2 Project libssh2 libssh2_project:libssh2 (from the name) | 1.8.1 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
libssh2 libssh2 libssh2:libssh2 | before 1.8.1 | NVD |
debian debian_linux debian:debian_linux | 8.0 | NVD |
netapp ontap_select_deploy_administration_utility netapp:ontap_select_deploy_administration_utility | all versions | NVD |
opensuse leap opensuse:leap | 15.0; 42.3 | NVD |
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop | 7.0 | NVD |
redhat enterprise_linux_server redhat:enterprise_linux_server | 7.0 | NVD |
redhat enterprise_linux_server_aus redhat:enterprise_linux_server_aus | 7.6 | NVD |
redhat enterprise_linux_server_eus redhat:enterprise_linux_server_eus | 7.6 | NVD |
redhat enterprise_linux_server_tus redhat:enterprise_linux_server_tus | 7.6 | NVD |
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation | 7.0 | NVD |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3863x-refsource-confirm, issue-tracking, patch, third-party-advisory
- https://www.libssh2.org/CVE-2019-3863.htmlx-refsource-misc, patch, vendor-advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlmailing-list, x-refsource-mlist, third-party-advisory
- https://security.netapp.com/advisory/ntap-20190327-0005/x-refsource-confirm, third-party-advisory
- https://access.redhat.com/errata/RHSA-2019:0679vendor-advisory, x-refsource-redhat, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlvendor-advisory, x-refsource-suse, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/vendor-advisory, x-refsource-fedora
- https://www.debian.org/security/2019/dsa-4431vendor-advisory, x-refsource-debian
- https://seclists.org/bugtraq/2019/Apr/25mailing-list, x-refsource-bugtraq
- https://access.redhat.com/errata/RHSA-2019:1175vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2019:1652vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2019:1791vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2019:1943vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2019:2399vendor-advisory, x-refsource-redhat
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlx-refsource-misc
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.