USN-8090-1

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Source
https://ubuntu.com/security/notices/USN-8090-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8090-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8090-1
Upstream
Related
Published
2026-03-12T18:16:18Z
Modified
2026-03-17T06:42:31.892424Z
Summary
openssh vulnerabilities
Details

Jeremy Brown discovered that the OpenSSH GSSAPI Key Exchange incorrectly handled disconnecting clients. In non-default configurations where the GSSAPIKeyExchange setting is enabled, a remote attacker could use this issue to cause OpenSSH to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-3497)

David Leadbeater discovered that OpenSSH incorrectly handled certain control characters in usernames. When untrusted usernames and the ProxyCommand are being used, an attacker could possibly use this issue to execute arbitrary code. (CVE-2025-61984)

David Leadbeater discovered that OpenSSH incorrectly handled NULL characters in ssh:// URIs. When the ProxyCommand is being used, an attacker could possibly use this issue to execute arbitrary code. (CVE-2025-61985)

References

Affected packages

Ubuntu:22.04:LTS / openssh

Package

Name
openssh
Purl
pkg:deb/ubuntu/openssh@1:8.9p1-3ubuntu0.14?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:8.9p1-3ubuntu0.14

Affected versions

1:8.*
1:8.4p1-6ubuntu2
1:8.7p1-2
1:8.7p1-2build1
1:8.7p1-4
1:8.8p1-1
1:8.9p1-3
1:8.9p1-3ubuntu0.1
1:8.9p1-3ubuntu0.3
1:8.9p1-3ubuntu0.4
1:8.9p1-3ubuntu0.5
1:8.9p1-3ubuntu0.6
1:8.9p1-3ubuntu0.7
1:8.9p1-3ubuntu0.10
1:8.9p1-3ubuntu0.11
1:8.9p1-3ubuntu0.13

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "openssh-client",
            "binary_version": "1:8.9p1-3ubuntu0.14"
        },
        {
            "binary_name": "openssh-server",
            "binary_version": "1:8.9p1-3ubuntu0.14"
        },
        {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:8.9p1-3ubuntu0.14"
        },
        {
            "binary_name": "openssh-tests",
            "binary_version": "1:8.9p1-3ubuntu0.14"
        },
        {
            "binary_name": "ssh",
            "binary_version": "1:8.9p1-3ubuntu0.14"
        },
        {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:8.9p1-3ubuntu0.14"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8090-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-61984"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-61985"
        },
        {
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-3497"
        }
    ]
}

Ubuntu:24.04:LTS / openssh

Package

Name
openssh
Purl
pkg:deb/ubuntu/openssh@1:9.6p1-3ubuntu13.15?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.6p1-3ubuntu13.15

Affected versions

1:9.*
1:9.3p1-1ubuntu3
1:9.4p1-1ubuntu1
1:9.6p1-3ubuntu1
1:9.6p1-3ubuntu2
1:9.6p1-3ubuntu11
1:9.6p1-3ubuntu12
1:9.6p1-3ubuntu13
1:9.6p1-3ubuntu13.3
1:9.6p1-3ubuntu13.4
1:9.6p1-3ubuntu13.5
1:9.6p1-3ubuntu13.7
1:9.6p1-3ubuntu13.8
1:9.6p1-3ubuntu13.9
1:9.6p1-3ubuntu13.11
1:9.6p1-3ubuntu13.12
1:9.6p1-3ubuntu13.13
1:9.6p1-3ubuntu13.14

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "openssh-client",
            "binary_version": "1:9.6p1-3ubuntu13.15"
        },
        {
            "binary_name": "openssh-server",
            "binary_version": "1:9.6p1-3ubuntu13.15"
        },
        {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:9.6p1-3ubuntu13.15"
        },
        {
            "binary_name": "openssh-tests",
            "binary_version": "1:9.6p1-3ubuntu13.15"
        },
        {
            "binary_name": "ssh",
            "binary_version": "1:9.6p1-3ubuntu13.15"
        },
        {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:9.6p1-3ubuntu13.15"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8090-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-61984"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-61985"
        },
        {
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-3497"
        }
    ]
}

Ubuntu:25.10 / openssh

Package

Name
openssh
Purl
pkg:deb/ubuntu/openssh@1:10.0p1-5ubuntu5.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:10.0p1-5ubuntu5.1

Affected versions

1:9.*
1:9.9p1-3ubuntu3
1:9.9p1-3ubuntu3.1
1:10.*
1:10.0p1-5ubuntu2
1:10.0p1-5ubuntu3
1:10.0p1-5ubuntu4
1:10.0p1-5ubuntu5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "openssh-client",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "openssh-client-gssapi",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "openssh-server",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "openssh-server-gssapi",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "openssh-tests",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "ssh",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        },
        {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:10.0p1-5ubuntu5.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8090-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-61984"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-61985"
        },
        {
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-3497"
        }
    ]
}