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Vulnerability record · CVE-2015-3146 · published 13 April 2016

CVE-2015-3146: Libssh vulnerability

Libssh · Libssh

The (1) SSH_MSG_NEWKEYS and (2) SSH_MSG_KEXDH_REPLY packet handlers in package_cb.c in libssh before 0.6.5 do not properly validate state, which allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted SSH packet.

7.5 CVSS 3.0 High EPSS 4.0% · top 9.4%
7.5CVSS 3.0 base score, v2 5.0
4.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

The (1) SSH_MSG_NEWKEYS and (2) SSH_MSG_KEXDH_REPLY packet handlers in package_cb.c in libssh before 0.6.5 do not properly validate state, which allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted SSH packet.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html
http://www.debian.org/security/2016/dsa-3488
http://www.ubuntu.com/usn/USN-2912-1
https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f
https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/ Vendor Advisory
https://www.libssh.org/security/advisories/CVE-2015-3146.txt Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html
http://www.debian.org/security/2016/dsa-3488
http://www.ubuntu.com/usn/USN-2912-1
https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f
https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/ Vendor Advisory
https://www.libssh.org/security/advisories/CVE-2015-3146.txt Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2015-3146), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.