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SUSE Google Guest Agent Vital Denial of Service Patch Released 2026-22376-1

suse
Calendar Grey July 1, 2026
Dist Suse Esm H88
SUSE announced an important security update for google-guest-agent fixing 15 issues including DoS and authorization bypass.
An update that solves 15 vulnerabilities can now be installed.

Summary

## 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

Topics%20covered

Topics Covered

security advisory SuSE DoS important authorization bypass Google Guest Agent

References

* bsc#1243254

* bsc#1243505

* bsc#1260264

* bsc#1266171

* bsc#1266603

Cross-

* 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 ): 8.6

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-2026-33186 ( 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 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

* CVE-2026-33186 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:22376-1
Release Date: 2026-06-26T08:17:18Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE DoS important authorization bypass Google Guest Agent

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