USN-8914-1

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Source
https://ubuntu.com/security/notices/USN-8914-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8914-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8914-1
Upstream
Related
Published
2026-10-12T15:24:07Z
Modified
2026-10-12T20:28:08Z
Summary
google-guest-agent, google-osconfig-agent vulnerability
Details

It was discovered that the Go x/net/idna package, vendored in Google Guest Agent and Google OS Config Agent, incorrectly accepted Punycode-encoded labels that decoded to ASCII-only labels when processing internationalized domain names. A remote attacker could possibly use this issue to bypass hostname-based access controls and escalate privileges.

References

Affected packages

Ubuntu:22.04:LTS / google-guest-agent

Package

Name
google-guest-agent
Purl
pkg:deb/ubuntu/google-guest-agent?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
20250116.00-0ubuntu1~22.04.4

Affected versions

20210629.*
20210629.00-0ubuntu1
20210629.00-0ubuntu2
20220104.*
20220104.00-0ubuntu1
20220104.00-0ubuntu2
20220622.*
20220622.00-0ubuntu2~22.04.0
20220622.00-0ubuntu2~22.04.1
20230426.*
20230426.00-0ubuntu2~22.04.0
20231004.*
20231004.02-0ubuntu1~22.04.1
20231004.02-0ubuntu1~22.04.2
20231004.02-0ubuntu1~22.04.3
20231004.02-0ubuntu1~22.04.4
20231004.02-0ubuntu1~22.04.5
20240716.*
20240716.00-0ubuntu1~22.04.0
20241011.*
20241011.01-0ubuntu1~22.04.0
20250116.*
20250116.00-0ubuntu1~22.04.0
20250116.00-0ubuntu1~22.04.1
20250116.00-0ubuntu1~22.04.2
20250116.00-0ubuntu1~22.04.3

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "google-guest-agent",
            "binary_version":  "20250116.00-0ubuntu1~22.04.4"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-39821",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8914-1.json"

Ubuntu:22.04:LTS / google-osconfig-agent

Package

Name
google-osconfig-agent
Purl
pkg:deb/ubuntu/google-osconfig-agent?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
20251028.00-0ubuntu2~22.04.1

Affected versions

20210608.*
20210608.1-0ubuntu1
20210608.1-0ubuntu2
20210608.1-0ubuntu3
20220824.*
20220824.00-0ubuntu1~22.04.1
20220824.00-0ubuntu1~22.04.2
20230504.*
20230504.00-0ubuntu1~22.04.0
20230504.00-0ubuntu1~22.04.1
20240320.*
20240320.00-0ubuntu1~22.04.0
20240320.00-0ubuntu1~22.04.1
20240524.*
20240524.03-0ubuntu2~22.04.0
20240524.03-0ubuntu2~22.04.1
20240926.*
20240926.03-0ubuntu1~22.04.0
20250115.*
20250115.01-0ubuntu1~22.04.0
20251028.*
20251028.00-0ubuntu2~22.04.0

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "google-osconfig-agent",
            "binary_version":  "20251028.00-0ubuntu2~22.04.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-39821",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8914-1.json"