Rocky Linux 9 [CIQ] Security Update: libssh / libssh-config / libssh-debuginfo / libssh-debugsource / etc Multiple Vulnerabilities (crlsa-2026_18683)

high Nessus Plugin ID 355927

Synopsis

The Rocky Linux host is missing one or more security updates.

Description

The Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_18683 advisory.

* libssh: Double Free Vulnerability in libssh Key Export Functions (CVE-2025-5351)

* libssh: Use of uninitialized variable in privatekey_from_file() (CVE-2025-4878)

* libssh: Write beyond bounds in binary to base64 conversion functions (CVE-2025-4877)

* libssh: NULL Pointer Dereference in libssh KEX Session ID Calculation (CVE-2025-8114)

* libssh: Memory Exhaustion via Repeated Key Exchange in libssh (CVE-2025-8277)

* libssh: Buffer underflow in ssh_get_hexa() on invalid input (CVE-2026-0966)

* libssh: Improper sanitation of paths received from SCP servers (CVE-2026-0964)

* libssh: libssh: Denial of Service via improper configuration file handling (CVE-2026-0965)

* libssh: libssh: Denial of Service via inefficient regular expression processing (CVE-2026-0967)

* libssh: libssh: Denial of Service due to malformed SFTP message (CVE-2026-0968)

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages based on the guidance in CIQ advisory crlsa-2026_18683.

Plugin Details

Severity: High

ID: 355927

File Name: ciq_rocky_linux_9_crlsa-2026_18683.nasl

Version: 1.1

Type: Local

Family: Rocky Linux Local Security Checks

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.02

Vendor

Vendor Severity: Unknown

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-0966

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RockyLinux/release, Host/RockyLinux/rpm-list, Host/OS/extended-third-party

Exploit Ease: No known exploits are available

Patch Publication Date: 5/28/2026

Vulnerability Publication Date: 7/3/2025

Reference Information

CVE: CVE-2025-4877, CVE-2025-4878, CVE-2025-5351, CVE-2025-8114, CVE-2025-8277, CVE-2026-0964, CVE-2026-0965, CVE-2026-0966, CVE-2026-0967, CVE-2026-0968

Detections

Analytics