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Ubuntu 25.10: Google Guest Agent Critical Denial of Service USN-7956-1

ubuntu
Calendar Grey January 13, 2026
Dist Ubuntu Esm H88
Google Guest Agent vulnerability causes crashes from crafted traffic. Secure your system with necessary updates immediately.
Google Guest Agent could be made to crash if it received specially crafted network traffic.

Summary

Google Guest Agent could be made to crash if it received specially

crafted network traffic.

Software Description:

- google-guest-agent: Google Compute Engine Guest Agent

Details:

Jakub Ciolek discovered that the Go Cryptography module included in

Google Guest Agent did not validate GSSAPI authentication requests during

SSH operations. An attacker could possibly use this issue to cause a

denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network traffic Google Guest Agent

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  google-guest-agent              20250506.01-0ubuntu1.1

Ubuntu 25.04
  google-guest-agent              20250116.00-0ubuntu2.2

Ubuntu 24.04 LTS
  google-guest-agent              20250116.00-0ubuntu1~24.04.3

Ubuntu 22.04 LTS
  google-guest-agent              20250116.00-0ubuntu1~22.04.2

Ubuntu 20.04 LTS
  google-guest-agent              20250116.00-0ubuntu1~20.04.0+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  google-guest-agent              20241011.01-0ubuntu1~18.04.0+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  google-guest-agent              20240716.00-0ubuntu1~16.04.0+esm2
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7956-1

CVE-2025-58181

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7956-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network traffic Google Guest Agent

Package Information

https://launchpad.net/ubuntu/+source/google-guest-agent/20250116.00-0ubuntu1~24.04.3
https://launchpad.net/ubuntu/+source/google-guest-agent/20250116.00-0ubuntu1~22.04.2

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