CVE-2026-58051
libssh2 - Free of Uninitialized Pointer in publickey List Cleanup
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-908 |
| Vendor | libssh2 |
| Product | libssh2 |
| Published | Jun 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
libssh2 / libssh2
0 ≤ 1.11.1
References
Credits
ashdfrkl