USN-8382-1

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Source
https://ubuntu.com/security/notices/USN-8382-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8382-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8382-1
Upstream
Related
Published
2026-06-03T16:29:23Z
Modified
2026-06-04T02:14:09.170494334Z
Summary
exim4 vulnerabilities
Details

Timo Longin discovered that Exim incorrectly handled certain SMTP messages in PIPELINING/CHUNKING configurations. A remote attacker could possibly use this issue to perform SMTP smuggling. This issue only affected Ubuntu 14.04 LTS. (CVE-2023-51766)

It was discovered that Exim incorrectly handled certain malformed JSON data in headers. A remote attacker could possibly use this issue to crash Exim, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-40685)

It was discovered that Exim incorrectly handled certain malformed UTF-8 headers. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-40686)

It was discovered that Exim incorrectly handled certain SPA resources. A remote attacker could possibly use this issue to crash Exim, resulting in a denial of service, or obtain sensitive information. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-40687)

It was discovered that Exim incorrectly handled certain CHUNKING transfers in some GnuTLS configurations. A remote attacker could possibly use this issue to crash Exim, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-45185)

Warisjeet Singh discovered that Exim incorrectly handled certain proxy connections in builds with proxy support enabled. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-48840)

References

Affected packages

Ubuntu:Pro:14.04:LTS / exim4

Package

Name
exim4
Purl
pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.82-3ubuntu2.4+esm9

Affected versions

4.*
4.80-7ubuntu3
4.80-7ubuntu4
4.80-9ubuntu1
4.80-9ubuntu2
4.82-3ubuntu1
4.82-3ubuntu2
4.82-3ubuntu2.1
4.82-3ubuntu2.2
4.82-3ubuntu2.3
4.82-3ubuntu2.4
4.82-3ubuntu2.4+esm1
4.82-3ubuntu2.4+esm2
4.82-3ubuntu2.4+esm3
4.82-3ubuntu2.4+esm4
4.82-3ubuntu2.4+esm6
4.82-3ubuntu2.4+esm7
4.82-3ubuntu2.4+esm8

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.82-3ubuntu2.4+esm9",
            "binary_name": "exim4"
        },
        {
            "binary_name": "exim4-base",
            "binary_version": "4.82-3ubuntu2.4+esm9"
        },
        {
            "binary_version": "4.82-3ubuntu2.4+esm9",
            "binary_name": "exim4-config"
        },
        {
            "binary_version": "4.82-3ubuntu2.4+esm9",
            "binary_name": "exim4-daemon-heavy"
        },
        {
            "binary_name": "exim4-daemon-light",
            "binary_version": "4.82-3ubuntu2.4+esm9"
        },
        {
            "binary_name": "eximon4",
            "binary_version": "4.82-3ubuntu2.4+esm9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8382-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2023-51766"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / exim4

Package

Name
exim4
Purl
pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.86.2-2ubuntu2.6+esm9

Affected versions

4.*
4.86-3ubuntu1
4.86-7ubuntu1
4.86-7ubuntu2
4.86-7ubuntu3
4.86.2-2ubuntu1
4.86.2-2ubuntu2
4.86.2-2ubuntu2.1
4.86.2-2ubuntu2.2
4.86.2-2ubuntu2.3
4.86.2-2ubuntu2.4
4.86.2-2ubuntu2.5
4.86.2-2ubuntu2.6
4.86.2-2ubuntu2.6+esm1
4.86.2-2ubuntu2.6+esm2
4.86.2-2ubuntu2.6+esm4
4.86.2-2ubuntu2.6+esm5
4.86.2-2ubuntu2.6+esm6
4.86.2-2ubuntu2.6+esm7
4.86.2-2ubuntu2.6+esm8

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "exim4",
            "binary_version": "4.86.2-2ubuntu2.6+esm9"
        },
        {
            "binary_name": "exim4-base",
            "binary_version": "4.86.2-2ubuntu2.6+esm9"
        },
        {
            "binary_name": "exim4-config",
            "binary_version": "4.86.2-2ubuntu2.6+esm9"
        },
        {
            "binary_version": "4.86.2-2ubuntu2.6+esm9",
            "binary_name": "exim4-daemon-heavy"
        },
        {
            "binary_name": "exim4-daemon-light",
            "binary_version": "4.86.2-2ubuntu2.6+esm9"
        },
        {
            "binary_name": "eximon4",
            "binary_version": "4.86.2-2ubuntu2.6+esm9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8382-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-48840"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / exim4

Package

Name
exim4
Purl
pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.90.1-1ubuntu1.10+esm6

Affected versions

4.*
4.89-5ubuntu1
4.89-9ubuntu1
4.89-9ubuntu2
4.89-9ubuntu3
4.89-9ubuntu4
4.90.1-1ubuntu1
4.90.1-1ubuntu1.1
4.90.1-1ubuntu1.2
4.90.1-1ubuntu1.3
4.90.1-1ubuntu1.4
4.90.1-1ubuntu1.5
4.90.1-1ubuntu1.8
4.90.1-1ubuntu1.9
4.90.1-1ubuntu1.10
4.90.1-1ubuntu1.10+esm1
4.90.1-1ubuntu1.10+esm2
4.90.1-1ubuntu1.10+esm3
4.90.1-1ubuntu1.10+esm4
4.90.1-1ubuntu1.10+esm5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.90.1-1ubuntu1.10+esm6",
            "binary_name": "exim4"
        },
        {
            "binary_name": "exim4-base",
            "binary_version": "4.90.1-1ubuntu1.10+esm6"
        },
        {
            "binary_version": "4.90.1-1ubuntu1.10+esm6",
            "binary_name": "exim4-config"
        },
        {
            "binary_name": "exim4-daemon-heavy",
            "binary_version": "4.90.1-1ubuntu1.10+esm6"
        },
        {
            "binary_version": "4.90.1-1ubuntu1.10+esm6",
            "binary_name": "exim4-daemon-light"
        },
        {
            "binary_name": "eximon4",
            "binary_version": "4.90.1-1ubuntu1.10+esm6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8382-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-48840"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / exim4

Package

Name
exim4
Purl
pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.93-13ubuntu1.12+esm1

Affected versions

4.*
4.92.1-1ubuntu3
4.92.1-1ubuntu4
4.93~RC2-1ubuntu1
4.93-9ubuntu1
4.93-11ubuntu1
4.93-12ubuntu1
4.93-13ubuntu1
4.93-13ubuntu1.1
4.93-13ubuntu1.5
4.93-13ubuntu1.6
4.93-13ubuntu1.7
4.93-13ubuntu1.8
4.93-13ubuntu1.9
4.93-13ubuntu1.10
4.93-13ubuntu1.11
4.93-13ubuntu1.12

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "exim4",
            "binary_version": "4.93-13ubuntu1.12+esm1"
        },
        {
            "binary_name": "exim4-base",
            "binary_version": "4.93-13ubuntu1.12+esm1"
        },
        {
            "binary_version": "4.93-13ubuntu1.12+esm1",
            "binary_name": "exim4-config"
        },
        {
            "binary_name": "exim4-daemon-heavy",
            "binary_version": "4.93-13ubuntu1.12+esm1"
        },
        {
            "binary_version": "4.93-13ubuntu1.12+esm1",
            "binary_name": "exim4-daemon-light"
        },
        {
            "binary_name": "eximon4",
            "binary_version": "4.93-13ubuntu1.12+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8382-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-40685"
        },
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-40686"
        },
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-40687"
        },
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ],
            "id": "CVE-2026-45185"
        },
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-48840"
        }
    ]
}