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    CVE-2015-3146

    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.

    Published:Apr 30, 2015
    Last Modified:Apr 12, 2025
    EPS:Apr 13, 2016
    EPSS Score:0.02391
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Libssh
    Product
    Libssh

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
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    References

    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/
    https://www.libssh.org/security/advisories/CVE-2015-3146.txt
    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/
    https://www.libssh.org/security/advisories/CVE-2015-3146.txt

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High