UBUNTU-CVE-2026-79775

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Source
https://ubuntu.com/security/CVE-2026-79775
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79775.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-79775
Upstream
Published
2026-08-25T16:17:00Z
Modified
2026-09-02T19:36:49Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

rclone versions >= v1.72.0 and <= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service vulnerabilities in the archive backend's SquashFS parser, which relies on the github.com/diskfs/go-diskfs dependency. The parser fails to validate attacker-controlled superblock and metadata values before use. An attacker who can place or modify a SquashFS image in storage exposed through an rclone :archive: remote can craft a malicious image that triggers an integer division-by-zero panic (zero block size), an out-of-bounds slice panic (out-of-range inode metadata offset), or a non-progress CPU loop (truncated metadata stream). Variants 1 and 2 terminate the rclone process and, via 'rclone serve sftp', can crash the entire SFTP server; variant 3 causes sustained CPU consumption. Parsing is lazy, so a victim or remote client must address or descend into the malicious archive object to trigger it.

References

Affected packages

Ubuntu:18.04:LTS / rclone

Package

Name
rclone
Purl
pkg:deb/ubuntu/rclone?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.36-3
1.36-3ubuntu0.1
1.36-3ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "golang-github-ncw-rclone-dev",
            "binary_version":  "1.36-3ubuntu0.2"
        },
        {
            "binary_name":  "rclone",
            "binary_version":  "1.36-3ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79775.json"

Ubuntu:Pro:20.04:LTS / rclone

Package

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

Affected ranges

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

Affected versions

1.*
1.47.0+ex1-6
1.47.0+ex1-7
1.49.5-2
1.49.5-3
1.50.2-2
1.50.2-2ubuntu0.1
1.50.2-2ubuntu0.2
1.50.2-2ubuntu0.2+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "golang-github-rclone-rclone-dev",
            "binary_version":  "1.50.2-2ubuntu0.2+esm1"
        },
        {
            "binary_name":  "rclone",
            "binary_version":  "1.50.2-2ubuntu0.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79775.json"

Ubuntu:Pro:22.04:LTS / rclone

Package

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

Affected ranges

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

Affected versions

1.*
1.53.3-1
1.53.3-2
1.53.3-4
1.53.3-4ubuntu1
1.53.3-4ubuntu1.22.04.1
1.53.3-4ubuntu1.22.04.2
1.53.3-4ubuntu1.22.04.3
1.53.3-4ubuntu1.22.04.3+esm1
1.53.3-4ubuntu1.22.04.4
1.53.3-4ubuntu1.22.04.4+esm1
1.53.3-4ubuntu1.22.04.5
1.53.3-4ubuntu1.22.04.5+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "golang-github-rclone-rclone-dev",
            "binary_version":  "1.53.3-4ubuntu1.22.04.5+esm1"
        },
        {
            "binary_name":  "rclone",
            "binary_version":  "1.53.3-4ubuntu1.22.04.5+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79775.json"

Ubuntu:Pro:24.04:LTS / rclone

Package

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

Affected ranges

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

Affected versions

1.*
1.60.1+dfsg-2build1
1.60.1+dfsg-3
1.60.1+dfsg-3ubuntu0.24.04.1
1.60.1+dfsg-3ubuntu0.24.04.2
1.60.1+dfsg-3ubuntu0.24.04.3
1.60.1+dfsg-3ubuntu0.24.04.4
1.60.1+dfsg-3ubuntu0.24.04.4+esm1
1.60.1+dfsg-3ubuntu0.24.04.5
1.60.1+dfsg-3ubuntu0.24.04.5+esm1
1.60.1+dfsg-3ubuntu0.24.04.6
1.60.1+dfsg-3ubuntu0.24.04.6+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "golang-github-rclone-rclone-dev",
            "binary_version":  "1.60.1+dfsg-3ubuntu0.24.04.6+esm1"
        },
        {
            "binary_name":  "rclone",
            "binary_version":  "1.60.1+dfsg-3ubuntu0.24.04.6+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79775.json"

Ubuntu:Pro:26.04:LTS / rclone

Package

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

Affected ranges

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

Affected versions

1.*
1.60.1+dfsg-4ubuntu2
1.60.1+dfsg-4ubuntu3
1.60.1+dfsg-4ubuntu3.1
1.60.1+dfsg-4ubuntu3.1+esm1
1.60.1+dfsg-4ubuntu3.2
1.60.1+dfsg-4ubuntu3.2+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "golang-github-rclone-rclone-dev",
            "binary_version":  "1.60.1+dfsg-4ubuntu3.2+esm1"
        },
        {
            "binary_name":  "rclone",
            "binary_version":  "1.60.1+dfsg-4ubuntu3.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79775.json"