CVE details
CVE-2026-58050
libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow 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 reads an attacker-controlled 32-bit attribute
count from a publickey-subsystem response and uses it in the
allocation num_attrs * sizeof(libssh2_publickey_attribute) without
bounds checking, so on 32-bit platforms the multiplication overflows
to an undersized buffer. A malicious SSH server can then drive the
attribute-parsing loop to write past the allocation, causing a heap
buffer overflow in a connecting libssh2 client.</p>
</body>
</description>
<references>
<cvename>CVE-2026-58050</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-58050</url>
</references>
<dates>
<discovery>2026-06-28</discovery>
<entry>2026-10-26</entry>
</dates>
</vuln>