CVE-2019-3859

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

CVSS 3.1

9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS

6.3% chance of exploitation in the next 30 days; higher than 93% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2019-03-21

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• fedoraproject:fedora
• libssh2:libssh2
• netapp:ontap_select_deploy_administration_utility
• opensuse:leap

References

• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html
• http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html

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