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Echo: libssh2: security update to 1.11.1-1+e4

high Tenable Cloud Security Plugin ID 460215

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-58051)

Solution

Update the libssh2 library and its related packages to version 1.11.1-1+e4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-58051

Plugin Details

Severity: High

ID: 460215

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.86

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:C

CVSS Score Source: CVE-2026-58051

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:P

Vector: 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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/29/2026

Vulnerability Publication Date: 6/28/2026

Reference Information

CVE: CVE-2026-58051