USN-8349-3

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Source
https://ubuntu.com/security/notices/USN-8349-3
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8349-3.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8349-3
Related
Published
2026-06-16T07:31:50Z
Modified
2026-06-16T13:44:10.043459151Z
Summary
rsync regression
Details

USN-8349-1 fixed vulnerabilities in rsync. Unfortunately that update introduced multiple regressions in rsync functionality. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Calum Hutton discovered that rsync contained a heap-based out-of-bounds read when handling file transfers. A remote attacker with read access to an rsync server could possibly use this issue to cause a denial of service. (CVE-2025-10158)

Batuhan Sancak, Damien Neil, and Michael Stapelberg discovered that rsync daemons configured without chroot protection were exposed to a race condition on parent path components. A local attacker with write access to a module could possibly use this issue to overwrite files, obtain sensitive information, or escalate privileges. (CVE-2026-29518)

It was discovered that rsync did not properly validate a length value while sorting extended attributes. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-41035)

It was discovered that rsync performed reverse-DNS lookups after chrooting in some daemon configurations. A remote attacker could possibly use this issue to bypass hostname-based access controls and access network services. (CVE-2026-43617)

Omar Elsayed discovered that rsync did not properly check for integer overflows while decoding compressed tokens. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-43618)

Andrew Tridgell discovered that rsync did not fully fix a symlink race condition in path-based system calls for daemons configured without chroot protection. A local attacker could possibly use this issue to overwrite files, obtain sensitive information, or escalate privileges. (CVE-2026-43619)

Pratham Gupta discovered that rsync did not properly validate an index while processing file lists. A remote attacker could possibly use this issue to cause rsync to crash, resulting in a denial of service. (CVE-2026-43620)

Michal Ruprich discovered that rsync contained an off-by-one error while handling HTTP proxy responses. An attacker able to intercept network communications or a malicious proxy server could possibly use this issue to cause a denial of service. (CVE-2026-45232)

References

Affected packages

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
Fixed
3.1.0-2ubuntu0.4+esm4

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
3.1.0-2ubuntu0.4+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.1.0-2ubuntu0.4+esm4",
            "binary_name": "rsync"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": []
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8349-3.json"

Ubuntu:Pro:16.04:LTS / rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.1-3ubuntu1.3+esm6

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
3.1.1-3ubuntu1.3+esm5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.1.1-3ubuntu1.3+esm6",
            "binary_name": "rsync"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": []
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8349-3.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
Fixed
3.1.2-2.1ubuntu1.6+esm4

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
3.1.2-2.1ubuntu1.6+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.1.2-2.1ubuntu1.6+esm4",
            "binary_name": "rsync"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": []
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8349-3.json"

Ubuntu:Pro:20.04:LTS / rsync

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.3-8ubuntu0.9+esm2

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
3.1.3-8ubuntu0.9+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.1.3-8ubuntu0.9+esm2",
            "binary_name": "rsync"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": []
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8349-3.json"