Detections
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Fedora 43 : opkssh (2026-38b019a0f0)

high Nessus Plugin ID 348359

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-38b019a0f0 advisory.

 Update the bundled golang.org/x/crypto to v0.56.0, which fixes CVE-2026-56855 and CVE-2026-78662 (denial of service via crafted channel messages in golang.org/x/crypto/ssh's connection multiplexer).

 opkssh only uses golang.org/x/crypto/ssh for key and certificate handling and never establishes SSH connections through it, so the vulnerable code is not reachable in any opkssh build (confirmed with govulncheck).


Tenable has extracted the preceding description block directly from the Fedora 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 opkssh package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-38b019a0f0

Plugin Details

Severity: High

ID: 348359

File Name: fedora_2026-38b019a0f0.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/20/2026

Updated: 9/20/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-78662

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:43, p-cpe:/a:fedoraproject:fedora:opkssh

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/12/2026

Vulnerability Publication Date: 9/2/2026

Reference Information

CVE: CVE-2026-56855, CVE-2026-78662