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SUSE SLES16 Security Update : mcphost (SUSE-SU-2026:22193-1)

high Nessus Plugin ID 322889

Synopsis

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

Description

The remote SUSE Linux SLES16 / SLES_SAP16 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22193-1 advisory.

 This update for mcphost fixes the following issues

 - CVE-2026-25680,CVE-2026-25681,CVE-2026-27136,CVE-2026-42502,CVE-2026-42506: golang.org/x/net/html:
 multiple issues when parsing HTML files (bsc#1267109).
 - CVE-2026-33814: golang.org/x/net/http2: infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE (bsc#1265730).
 - CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation bypass and privilege escalation (bsc#1266572).
 - CVE-2026-39827: Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-39828: Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-39829: Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-39830: Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-39831: Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-39832: Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent (bsc#1266145).
 - CVE-2026-39833: Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent (bsc#1266145).
 - CVE-2026-39834: Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-39835: Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-42508: Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts (bsc#1266145).
 - CVE-2026-46595: Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-46597: Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh (bsc#1266145).
 - CVE-2026-46598: Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent (bsc#1266145).

Tenable has extracted the preceding description block directly from the SUSE 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 mcphost package.

See Also

https://bugzilla.suse.com/1265730

https://bugzilla.suse.com/1266145

https://bugzilla.suse.com/1266572

https://bugzilla.suse.com/1267109

https://lists.suse.com/pipermail/sle-updates/2026-June/047515.html

https://www.suse.com/security/cve/CVE-2026-25680

https://www.suse.com/security/cve/CVE-2026-25681

https://www.suse.com/security/cve/CVE-2026-27136

https://www.suse.com/security/cve/CVE-2026-33814

https://www.suse.com/security/cve/CVE-2026-39821

https://www.suse.com/security/cve/CVE-2026-39827

https://www.suse.com/security/cve/CVE-2026-39828

https://www.suse.com/security/cve/CVE-2026-39829

https://www.suse.com/security/cve/CVE-2026-39830

https://www.suse.com/security/cve/CVE-2026-39831

https://www.suse.com/security/cve/CVE-2026-39832

https://www.suse.com/security/cve/CVE-2026-39833

https://www.suse.com/security/cve/CVE-2026-39834

https://www.suse.com/security/cve/CVE-2026-39835

https://www.suse.com/security/cve/CVE-2026-42502

https://www.suse.com/security/cve/CVE-2026-42506

https://www.suse.com/security/cve/CVE-2026-42508

https://www.suse.com/security/cve/CVE-2026-46595

https://www.suse.com/security/cve/CVE-2026-46597

https://www.suse.com/security/cve/CVE-2026-46598

Plugin Details

Severity: High

ID: 322889

File Name: suse_SU-2026-22193-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/26/2026

Updated: 6/26/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, tenable_cloud_security, tenable_self_hosted_container_security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-33814

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:N/I:N/A:H

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:mcphost, cpe:/o:novell:suse_linux:16

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/20/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-25680, CVE-2026-25681, CVE-2026-27136, CVE-2026-33814, CVE-2026-39821, CVE-2026-39827, CVE-2026-39828, CVE-2026-39829, CVE-2026-39830, CVE-2026-39831, CVE-2026-39832, CVE-2026-39833, CVE-2026-39834, CVE-2026-39835, CVE-2026-42502, CVE-2026-42506, CVE-2026-42508, CVE-2026-46595, CVE-2026-46597, CVE-2026-46598

SuSE: SUSE-SU-2026:22193-1