A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access…
A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont
AI Analysis
Technical Summary
The vulnerability is a heap buffer overflow in the BitmapScaleBitmaps function of libXfont2 versions prior to 2.0.8. The overflow occurs due to an overflowing 32-bit size parameter, which can be leveraged by attackers who have access to the X Server to execute arbitrary code within the X server process. This could lead to full compromise of the X server privileges.
Potential Impact
Successful exploitation allows an attacker with access to the X Server to execute arbitrary code with the privileges of the X server process, potentially leading to full system compromise or denial of service. The vulnerability affects confidentiality, integrity, and availability.
Mitigation Recommendations
Patch libXfont2 to version 2.0.8 or later where this heap buffer overflow is fixed. Since no vendor advisory or patch links are provided, confirm patch availability from Ubuntu security advisories and apply updates accordingly. Until patched, restrict access to the X Server to trusted users only to reduce exploitation risk.
A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access…
Description
A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont
CVSS v3.1
Score 8.5high
Affected software
pkg:deb/ubuntu/libxfont@1:1.4.7-1ubuntu0.4?arch=source&distro=trustypkg:deb/ubuntu/libxfont@1:1.5.1-1ubuntu0.16.04.4?arch=source&distro=xenialpkg:deb/ubuntu/libxfont2@1:2.0.1-3~ubuntu16.04.3?arch=source&distro=xenialpkg:deb/ubuntu/libxfont@1:2.0.3-1?arch=source&distro=bionicpkg:deb/ubuntu/libxfont@1:2.0.3-1?arch=source&distro=focalpkg:deb/ubuntu/libxfont@1:2.0.5-1build1?arch=source&distro=jammypkg:deb/ubuntu/libxfont@1:2.0.6-1build1?arch=source&distro=noblepkg:deb/ubuntu/libxfont@1:2.0.6-1build1?arch=source&distro=questingpkg:deb/ubuntu/libxfont@1:2.0.6-2?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability is a heap buffer overflow in the BitmapScaleBitmaps function of libXfont2 versions prior to 2.0.8. The overflow occurs due to an overflowing 32-bit size parameter, which can be leveraged by attackers who have access to the X Server to execute arbitrary code within the X server process. This could lead to full compromise of the X server privileges.
Potential Impact
Successful exploitation allows an attacker with access to the X Server to execute arbitrary code with the privileges of the X server process, potentially leading to full system compromise or denial of service. The vulnerability affects confidentiality, integrity, and availability.
Mitigation Recommendations
Patch libXfont2 to version 2.0.8 or later where this heap buffer overflow is fixed. Since no vendor advisory or patch links are provided, confirm patch availability from Ubuntu security advisories and apply updates accordingly. Until patched, restrict access to the X Server to trusted users only to reduce exploitation risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-56001
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:14.04:LTS","Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a58b47468715ace43d8d50e
Added to database: 07/16/2026, 10:37:40 UTC
Last enriched: 07/16/2026, 11:48:44 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 4
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