SUSE-SU-2026:23831-1: important: Security update for google-guest-agent

Tue Sep 22 12:40:29 UTC 2026

# Security update for google-guest-agent

Announcement ID: SUSE-SU-2026:23831-1  
Release Date: 2026-09-14T11:13:59Z  
Rating: important  
References:

  * bsc#1253357
  * bsc#1272118
  * bsc#1278597
  * bsc#1278967
  * bsc#1279297
  * bsc#1279414

Cross-References:

  * CVE-2026-56852
  * CVE-2026-56854
  * CVE-2026-56855
  * CVE-2026-78662
  * CVE-2026-84303
  * CVE-2026-84304
  * CVE-2026-84445

CVSS scores:

  * 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
  * CVE-2026-56854 ( SUSE ):  8.6
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-56854 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-56854 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-56855 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-56855 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56855 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-78662 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-78662 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-78662 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-84303 ( 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-2026-84303 ( SUSE ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-84303 ( NVD ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-84304 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-84304 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-84304 ( NVD ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-84445 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-84445 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-84445 ( NVD ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected Products:

  * SUSE Linux Micro 6.0

An update that solves seven vulnerabilities can now be installed.

## Description:

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

  * CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on
    truncated/invalid UTF-8 input (bsc#1272118).
  * CVE-2026-56854,CVE-2026-56855,CVE-2026-78662: golang.org/x/crypto/ssh:
    authentication bypass and deadlocks in the crypto/ssh library (bsc#1278597).
  * CVE-2026-84303: google.golang.org/grpc: xDS RBAC HTTP filter implementation
    issue allows for bypass of authorization policies via mixed-case or
    canonical-case header matches (bsc#1279297).
  * CVE-2026-84304: google.golang.org/grpc: heap memory exhaustion via HTTP/2
    DATA frame fragmentation (bsc#1279414).
  * CVE-2026-84445: google.golang.org/grpc: DoS via crash due to missing
    ':authority' and 'Host' headers in gRPC-Go xDS servers (bsc#1278967).

Changes for google-guest-agent:

  * Update to version 20260903.01
  * Update dependencies to latest (#636)
  * fix octal digit comparison in morePermissive (#631)
  * Remove KillMode from google-guest-agent-manager (#629)
  * Fix SUSE Linux Micro 6+ (#628)
  * Fix oslogin for Micro 6+
  * Exclude irrelevant tests on FreeBSD (#625)
  * Replace abandoned serial dependency (#624)
  * Add build rules for MWLID extension
  * Support basic account management on FreeBSD (#619)
  * fix dependency between sshd and google-guest-agent-manager.service (#621)
  * Update go.mod dependencies (#622)
  * Fallback to shebang execution when running scripts (#618)
  * Update go dependencies (#620)
  * Make guest-agent buildable on FreeBSD (#617)

## 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:

  * SUSE Linux Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-898

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * google-guest-agent-20260903.01-1.1
    * google-guest-agent-debuginfo-20260903.01-1.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-56852.html
  * https://www.suse.com/security/cve/CVE-2026-56854.html
  * https://www.suse.com/security/cve/CVE-2026-56855.html
  * https://www.suse.com/security/cve/CVE-2026-78662.html
  * https://www.suse.com/security/cve/CVE-2026-84303.html
  * https://www.suse.com/security/cve/CVE-2026-84304.html
  * https://www.suse.com/security/cve/CVE-2026-84445.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1253357
  * https://bugzilla.suse.com/show_bug.cgi?id=1272118
  * https://bugzilla.suse.com/show_bug.cgi?id=1278597
  * https://bugzilla.suse.com/show_bug.cgi?id=1278967
  * https://bugzilla.suse.com/show_bug.cgi?id=1279297
  * https://bugzilla.suse.com/show_bug.cgi?id=1279414

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