UBUNTU-CVE-2026-43618

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Source
https://ubuntu.com/security/CVE-2026-43618
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-43618
Upstream
  • CVE-2026-43618
Downstream
Related
Published
2026-05-20T00:00:00Z
Modified
2026-05-20T22:02:51.390133527Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
  • 6.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.

References

Affected packages

Ubuntu:20.04:LTS
rsync

Package

Name
rsync
Purl
pkg:deb/ubuntu/rsync?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.3-6
3.1.3-8
3.1.3-8ubuntu0.1
3.1.3-8ubuntu0.2
3.1.3-8ubuntu0.3
3.1.3-8ubuntu0.4
3.1.3-8ubuntu0.5
3.1.3-8ubuntu0.7
3.1.3-8ubuntu0.8
3.1.3-8ubuntu0.9

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.1.3-8ubuntu0.9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:22.04:LTS
rsync

Package

Name
rsync
Purl
pkg:deb/ubuntu/rsync?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.2.7-0ubuntu0.22.04.6

Affected versions

3.*
3.2.3-4ubuntu1
3.2.3-4ubuntu2
3.2.3-8ubuntu1
3.2.3-8ubuntu2
3.2.3-8ubuntu3
3.2.3-8ubuntu3.1
3.2.7-0ubuntu0.22.04.2
3.2.7-0ubuntu0.22.04.3
3.2.7-0ubuntu0.22.04.4

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.2.7-0ubuntu0.22.04.6"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:24.04:LTS
rsync

Package

Name
rsync
Purl
pkg:deb/ubuntu/rsync?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.2.7-1ubuntu1.4

Affected versions

3.*
3.2.7-1
3.2.7-1build1
3.2.7-1build2
3.2.7-1ubuntu1
3.2.7-1ubuntu1.1
3.2.7-1ubuntu1.2

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.2.7-1ubuntu1.4"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:25.10
rsync

Package

Name
rsync
Purl
pkg:deb/ubuntu/rsync?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.1+ds1-5ubuntu1.2

Affected versions

3.*
3.4.1+ds1-3
3.4.1+ds1-4
3.4.1+ds1-5
3.4.1+ds1-5ubuntu1

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.4.1+ds1-5ubuntu1.2"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:26.04:LTS
rsync

Package

Name
rsync
Purl
pkg:deb/ubuntu/rsync?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.1+ds1-7ubuntu0.2

Affected versions

3.*
3.4.1+ds1-5ubuntu1
3.4.1+ds1-6
3.4.1+ds1-7

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.4.1+ds1-7ubuntu0.2"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:Pro:14.04:LTS
rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.0.9-4ubuntu1
3.1.0-2
3.1.0-2ubuntu0.1
3.1.0-2ubuntu0.2
3.1.0-2ubuntu0.3
3.1.0-2ubuntu0.4
3.1.0-2ubuntu0.4+esm1
3.1.0-2ubuntu0.4+esm2

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.1.0-2ubuntu0.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:Pro:16.04:LTS
rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.1-3
3.1.1-3ubuntu1
3.1.1-3ubuntu1.1
3.1.1-3ubuntu1.2
3.1.1-3ubuntu1.3
3.1.1-3ubuntu1.3+esm1
3.1.1-3ubuntu1.3+esm2
3.1.1-3ubuntu1.3+esm3
3.1.1-3ubuntu1.3+esm4

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.1.1-3ubuntu1.3+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"
Ubuntu:Pro:18.04:LTS
rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.2-2
3.1.2-2.1
3.1.2-2.1ubuntu1
3.1.2-2.1ubuntu1.1
3.1.2-2.1ubuntu1.2
3.1.2-2.1ubuntu1.3
3.1.2-2.1ubuntu1.4
3.1.2-2.1ubuntu1.5
3.1.2-2.1ubuntu1.6
3.1.2-2.1ubuntu1.6+esm1
3.1.2-2.1ubuntu1.6+esm2

Ecosystem specific 

{
    "priority_reason": "rsync developers have rated this as being a high severity issue",
    "binaries": [
        {
            "binary_name": "rsync",
            "binary_version": "3.1.2-2.1ubuntu1.6+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43618.json"