SUSE alert openSUSE-SU-2026:21069-1 (google-guest-agent)

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null@suse.de
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openSUSE-SU-2026:21069-1: important: Security update for google-guest-agent
Date:
             
 
Tue, 30 Jun 2026 09:48:12 +0200
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<20260630074812.5F38BFF7F@maintenance.suse.de>
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Article
openSUSE security update: security update for google-guest-agent
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21069-1
Rating: important
References:

  * bsc#1243254
  * bsc#1243505
  * bsc#1260264
  * bsc#1266171
  * bsc#1266603



Cross-References:

  * CVE-2026-33186
  * 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-2026-42508
  * CVE-2026-46595
  * CVE-2026-46597
  * CVE-2026-46598



CVSS scores:

  * CVE-2026-33186 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-33186 ( 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-2026-39821 ( 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-2026-39827 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-39827 ( SUSE ): 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-39828 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39828 ( 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-2026-39829 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-39829 ( 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-2026-39830 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-39830 ( SUSE ): 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-39831 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39831 ( 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-2026-39832 ( SUSE ): 8.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-39832 ( SUSE ): 6.2 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
  * CVE-2026-39833 ( SUSE ): 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39833 ( SUSE ): 8.5 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-39834 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-39834 ( 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-2026-39835 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-39835 ( 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-2026-42508 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-42508 ( 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-2026-46595 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-46595 ( 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-2026-46597 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-46597 ( 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-2026-46598 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-46598 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 15 vulnerabilities and has 5 bug fixes can now be installed.

Description:

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

- CVE-2026-33186: google.golang.org/grpc: authorization bypass due to improper validation of the
HTTP/2 :path pseudo-
  header (bsc#1260264).
- 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-2026-39827: Invoking memory leak when rejecting channels can lead to DoS in
golang.org/x/crypto/ssh (bsc#1266171).
- CVE-2026-39828: Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh
(bsc#1266171).
- CVE-2026-39829: Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh
(bsc#1266171).
- CVE-2026-39830: Invoking client can cause server deadlock on unexpected responses in
golang.org/x/crypto/ssh
  (bsc#1266171).
- CVE-2026-39831: Invoking bypass of FIDO/U2F security keys physical interaction in
golang.org/x/crypto/ssh
  (bsc#1266171).
- CVE-2026-39832: Invoking agent constraints dropped when forwarding keys in
golang.org/x/crypto/ssh/agent
  (bsc#1266171).
- CVE-2026-39833: Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent
(bsc#1266171).
- CVE-2026-39834: Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh
(bsc#1266171).
- CVE-2026-39835: Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh
(bsc#1266171).
- CVE-2026-42508: Invoking auth bypass via unenforced @revoked status in
golang.org/x/crypto/ssh/knownhosts
  (bsc#1266171).
- CVE-2026-46595: Invoking VerifiedPublicKeyCallback permissions skip enforcement in
golang.org/x/crypto/ssh
  (bsc#1266171).
- CVE-2026-46597: Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh
(bsc#1266171).
- CVE-2026-46598: Invoking pathological inputs can lead to client panic in
golang.org/x/crypto/ssh/agent (bsc#1266171).

Changes for google-guest-agent:

- Update to version 20260529.00
 * Dependency updates (#616)
- from version 20260522.00
 * Fix improper umask calculation on socket creation (#614)
- from version 20260520.01
 * Update OWNERS (#609)
 * Bump google.golang.org/grpc from 1.75.0 to 1.79.3 (#602) (bsc#1260264, CVE-2026-33186)
- Update to version 20250506.01 (bsc#1243254, bsc#1243505)


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-16.0-1091=1

Package List:

- openSUSE Leap 16.0:

  google-guest-agent-20260529.00-160000.1.1

References:

  * https://www.suse.com/security/cve/CVE-2026-33186.html
  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-39827.html
  * https://www.suse.com/security/cve/CVE-2026-39828.html
  * https://www.suse.com/security/cve/CVE-2026-39829.html
  * https://www.suse.com/security/cve/CVE-2026-39830.html
  * https://www.suse.com/security/cve/CVE-2026-39831.html
  * https://www.suse.com/security/cve/CVE-2026-39832.html
  * https://www.suse.com/security/cve/CVE-2026-39833.html
  * https://www.suse.com/security/cve/CVE-2026-39834.html
  * https://www.suse.com/security/cve/CVE-2026-39835.html
  * https://www.suse.com/security/cve/CVE-2026-42508.html
  * https://www.suse.com/security/cve/CVE-2026-46595.html
  * https://www.suse.com/security/cve/CVE-2026-46597.html
  * https://www.suse.com/security/cve/CVE-2026-46598.html