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SUSE Google Guest Agent Important Privilege Escalation Fix 2026-3210-1

suse
Calendar Grey July 23, 2026
Scroller Suse
SUSE statements regarding security updates for google-guest-agent addressing critical issues and patches available for related products.
SUSE has released an important security update for google-guest-agent, addressing CVE-2026-39821 to prevent privilege escalation

Summary

## This update for google-guest-agent fixes the following issue * 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). ## 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 15-SP4 zypper in -t patch SUSE-SLE-Module-Public-Cloud-15-SP4-2026-3210=1 * Public Cloud Module 15-SP7 zypper in -t patch SUSE-SLE-Module-Public-Cloud-15-SP7-2026-3210=1 * SUSE Linux Enterprise Micro 5.5 zypper in -t patch SUSE-SLE-Micro-5.5-2026-3210=1 * Public Cloud Module 15-SP5

Topics%20covered

Topics Covered

security advisory SuSE privilege escalation important Google Guest Agent CVE-2026-39821

References

* bsc#1266603

Cross-

* CVE-2026-39821

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 ): 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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

Affected Products:

* Public Cloud Module 15-SP4

* Public Cloud Module 15-SP5

* Public Cloud Module 15-SP6

* Public Cloud Module 15-SP7

* SUSE Linux Enterprise High Performance Computing 15 SP4

* SUSE Linux Enterprise High Performance Computing 15 SP5

* SUSE Linux Enterprise Micro 5.5

* SUSE Linux Enterprise Server 15 SP4

* SUSE Linux Enterprise Server 15 SP5

* SUSE Linux Enterprise Server 15 SP6

* SUSE Linux Enterprise Server 15 SP7

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:3210-1
Release Date: 2026-07-23T14:12:44Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE privilege escalation important Google Guest Agent CVE-2026-39821

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