Upstream information

CVE-2025-66034 at MITRE

Description

fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) National Vulnerability Database SUSE
Base Score 6.3 9.8 6.3
Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L
Attack Vector Local Network Local
Attack Complexity High Low High
Privileges Required None None None
User Interaction Required None Required
Scope Changed Unchanged Changed
Confidentiality Impact None High None
Integrity Impact High High High
Availability Impact Low High Low
CVSSv3 Version 3.1 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 5.7
Vector CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Attack Vector Local
Attack Complexity High
Attack Requirements None
Privileges Required None
User Interaction Active
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact High
Vulnerable System Availability Impact Low
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1254366 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Container suse/sl-micro/6.1/baremetal-os-container:latest
Image SL-Micro-Azure
Image SL-Micro-BYOS-Azure
Image SL-Micro-BYOS-EC2
Image SL-Micro-BYOS-GCE
Image SL-Micro-EC2
Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure
Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2
Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE
Image SUSE-Multi-Linux-Manager-Server-Azure-llc
Image SUSE-Multi-Linux-Manager-Server-Azure-ltd
Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure
Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2
Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE
Image SUSE-Multi-Linux-Manager-Server-EC2-llc
Image SUSE-Multi-Linux-Manager-Server-EC2-ltd
  • selinux-policy >= 20241031+git8.1f94e96d-slfo.1.1_1.1
  • selinux-policy-targeted >= 20241031+git8.1f94e96d-slfo.1.1_1.1
SUSE Linux Enterprise Module for Package Hub 15 SP7
  • python311-FontTools >= 4.47.2-150600.3.3.1
 Patchnames:
SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-199
openSUSE Leap 15.6
  • python311-FontTools >= 4.47.2-150600.3.3.1
 Patchnames:
openSUSE-SLE-15.6-2026-199
openSUSE Tumbleweed
  • python311-FontTools >= 4.61.1-1.1
  • python312-FontTools >= 4.61.1-1.1
  • python313-FontTools >= 4.61.1-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10076

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Server 16.0
  • python313-FontTools >= 4.53.1-160000.3.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Module for Package Hub 15 SP6 python-FontTools Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 python-FontTools Released
SUSE Linux Enterprise Server 16.0 python-FontTools In progress
openSUSE Leap 15.6 python-FontTools Released

SUSE Timeline for this CVE

CVE page created: Sat Nov 29 04:02:36 2025
CVE page last modified: Wed Jan 28 14:58:19 2026