CVEvulnerability

CVE-2026-58051

8.3 HIGH Published 2026-06-28 Modified 2026-10-25 Official page ↗
Status
Analyzed
Published
2026-06-28
Last modified
2026-10-25
Assigner
[email protected]
CVSS 4.0 ([email protected])
8.3 HIGH — CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Weaknesses
CWE-908

Description

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.

Affected configurations

• libssh2 libssh2 (<= 1.11.1)

Related

Weakness · CWE (1)

  • CWE-908 Use of Uninitialized Resource weakness

References