SUSE-SU-2026:3439-1: important: Security update for google-guest-agent

[SLE-UPDATES]

# Security update for google-guest-agent

Announcement ID: SUSE-SU-2026:3439-1  
Release Date: 2026-07-31T18:33:40Z  
Rating: important  
References:

  * bsc#1266603
  * bsc#1272118

  
Cross-References:

  * CVE-2026-39821
  * CVE-2026-56852

  
CVSS scores:

  * CVE-2026-39821 ( SUSE ):  9.1
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-39821 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-56852 ( SUSE ):  6.0
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-56852 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56852 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * Public Cloud Module 12
  * SUSE Linux Enterprise High Performance Computing 12 SP2
  * SUSE Linux Enterprise High Performance Computing 12 SP3
  * SUSE Linux Enterprise High Performance Computing 12 SP4
  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12
  * SUSE Linux Enterprise Server 12 SP1
  * SUSE Linux Enterprise Server 12 SP2
  * SUSE Linux Enterprise Server 12 SP3
  * SUSE Linux Enterprise Server 12 SP4
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server for SAP Applications 12
  * SUSE Linux Enterprise Server for SAP Applications 12 SP1
  * SUSE Linux Enterprise Server for SAP Applications 12 SP2
  * SUSE Linux Enterprise Server for SAP Applications 12 SP3
  * SUSE Linux Enterprise Server for SAP Applications 12 SP4
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for google-guest-agent fixes the following issues

  * CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only
    Punycode-encoded labels allows for validation bypass and privilege
    escalation (bsc#1266603).
  * CVE-2026-56852: golang.org/x/text/unicode/norm: improper handling of input
    containing invalid UTF-8 bytes can lead to infinite loop (bsc#1272118).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * Public Cloud Module 12  
    zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2026-3439=1

## Package List:

  * Public Cloud Module 12 (aarch64 ppc64le s390x x86_64)
    * google-guest-agent-20260529.00-1.66.2

## References:

  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-56852.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1266603
  * https://bugzilla.suse.com/show_bug.cgi?id=1272118

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