UBUNTU-CVE-2026-112935

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-112935
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-112935
Upstream
Published
2026-10-20T15:17:00Z
Modified
2026-10-28T20:16:22Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.

References

Affected packages

Ubuntu:26.04:LTS
python-filelock

Package

Name
python-filelock
Purl
pkg:deb/ubuntu/python-filelock?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.18.0-1
3.20.0-1
3.20.2-1
3.20.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-filelock",
            "binary_version": "3.20.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json"
Ubuntu:26.10
python-filelock

Package

Name
python-filelock
Purl
pkg:deb/ubuntu/python-filelock?arch=source&distro=stonking

Affected ranges

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

Affected versions

3.*
3.20.3-1
3.29.4-1
3.32.0-1
3.32.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-filelock",
            "binary_version": "3.32.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json"
Ubuntu:Pro:18.04:LTS
python-filelock

Package

Name
python-filelock
Purl
pkg:deb/ubuntu/python-filelock?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

2.*
2.0.11-1
2.0.12-1
2.0.13-1
3.*
3.0.0-2
3.0.3-1
3.0.4-1
3.0.4-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-filelock",
            "binary_version": "3.0.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-filelock",
            "binary_version": "3.0.4-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json"
Ubuntu:Pro:20.04:LTS
python-filelock

Package

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

Affected ranges

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

Affected versions

3.*
3.0.12-1
3.0.12-2
3.0.12-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-filelock",
            "binary_version": "3.0.12-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json"
Ubuntu:Pro:22.04:LTS
python-filelock

Package

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

Affected ranges

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

Affected versions

3.*
3.0.12-2
3.3.2-1
3.4.0-1
3.4.2-1
3.4.2-2
3.6.0-1
3.6.0-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-filelock",
            "binary_version": "3.6.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json"
Ubuntu:Pro:24.04:LTS
python-filelock

Package

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

Affected ranges

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

Affected versions

3.*
3.12.2-1
3.12.4-1
3.13.1-1
3.13.1-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-filelock",
            "binary_version": "3.13.1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-112935.json"