openSUSE-SU-2026:21476-1: important: Security update for google-guest-agent

openSUSE security update: security update for google-guest-agent
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Announcement ID: openSUSE-SU-2026:21476-1
Rating: important
References:

  * bsc#1266603
  * bsc#1272118



Cross-References:

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



CVSS scores:

  * 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 ( 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-2026-56852 ( 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 ( SUSE ): 6 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

Affected Products:

         openSUSE Leap 16.0

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An update that solves 2 vulnerabilities and has 2 bug fixes 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 openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-1387=1

Package List:

- openSUSE Leap 16.0:

  google-guest-agent-20260529.00-160000.2.1

References:

  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-56852.html