USN-8764-1

It was discovered that SRT did not authenticate certain encryption control messages. A remote attacker could possibly use this issue to downgrade an encrypted connection and inject arbitrary content or interrupt a media stream. (CVE-2026-55868)

It was discovered that SRT did not properly validate certain control packets during connection setup and key refresh operations. A remote attacker could possibly use this issue to cause SRT to crash, resulting in a denial of service. (CVE-2026-55869)

References

Affected packages

Ubuntu:Pro:20.04:LTS / srt

Package

Name: srt
Purl: pkg:deb/ubuntu/srt?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.4.0-1ubuntu0.1~esm1

Affected versions

1.*

1.3.2-1

1.4.0-1

1.4.0-1build1

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libsrt1",
            "binary_version": "1.4.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "srt-tools",
            "binary_version": "1.4.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-55868",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-55869",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8764-1.json"

Ubuntu:Pro:22.04:LTS / srt

Package

Name: srt
Purl: pkg:deb/ubuntu/srt?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.4.4-4ubuntu0.1~esm1

Affected versions

1.*

1.4.2-1.4

1.4.2-1.4ubuntu1

1.4.4-4

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libsrt1.4-gnutls",
            "binary_version": "1.4.4-4ubuntu0.1~esm1"
        },
        {
            "binary_name": "libsrt1.4-openssl",
            "binary_version": "1.4.4-4ubuntu0.1~esm1"
        },
        {
            "binary_name": "srt-tools",
            "binary_version": "1.4.4-4ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-55868",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-55869",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:22.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8764-1.json"

Ubuntu:Pro:24.04:LTS / srt

Package

Name: srt
Purl: pkg:deb/ubuntu/srt?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.5.3-1ubuntu0.1~esm1

Affected versions

1.*

1.5.2-1

1.5.3-1

1.5.3-1build1

1.5.3-1build2

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libsrt1.5-gnutls",
            "binary_version": "1.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libsrt1.5-openssl",
            "binary_version": "1.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "srt-tools",
            "binary_version": "1.5.3-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-55868",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-55869",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:24.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8764-1.json"

Ubuntu:Pro:26.04:LTS / srt

Package

Name: srt
Purl: pkg:deb/ubuntu/srt?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.5.4-3ubuntu0.1~esm1

Affected versions

1.*

1.5.4-1

1.5.4-3

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libsrt1.5-gnutls",
            "binary_version": "1.5.4-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libsrt1.5-openssl",
            "binary_version": "1.5.4-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "srt-tools",
            "binary_version": "1.5.4-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2026-55868",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-55869",
            "severity": [
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:26.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8764-1.json"