CVE details
CVE-2026-58051
libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.
Matched ports (2)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| security/libssh2 | libssh2 | 1.11.1_1,3 | unaddressed | sbz@FreeBSD.org |
| security/linux-c7-libssh2 | linux-c7-libssh2 | 1.8.0_2 | unaddressed | emulation@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>libssh2</name>
<range><lt>FIXME</lt></range>
</package>
<package>
<name>linux-c7-libssh2</name>
<range><lt>FIXME</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but
does not zero-initialize new entries before parsing populates them, so
a parse failure reaching the cleanup path leaves
libssh2_publickey_list_free operating on an uninitialized entry. A
malicious SSH server offering the publickey subsystem can use a
malformed response to make cleanup free an uninitialized,
attacker-influenceable attrs pointer in a connecting libssh2 client.</p>
</body>
</description>
<references>
<cvename>CVE-2026-58051</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-58051</url>
</references>
<dates>
<discovery>2026-06-28</discovery>
<entry>2026-10-26</entry>
</dates>
</vuln>