🛡️ CVE-2026-56001 on Ubuntu — libxfont

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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

Distribution advisory

This page covers CVE-2026-56001 as tracked by Ubuntu, for the package libxfont. The fix is available in version 1:2.0.6-2ubuntu0.2; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

UBUNTU-CVE-2026-56001 is recorded against 2 packages.

  • libxfont (fixed in 1:2.0.6-2ubuntu0.2)
  • libxfont2

Timeline and source

Published on 8 July 2026 and last revised on 21 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
www.openwall.com (Report)
ubuntu.com (Advisory)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-08
Updated 2026-08-12
Modified 2026-07-21
Fix URL N/A

Affected Packages

Software From version Fixed in
libxfont — 1:2.0.6-2ubuntu0.2
libxfont2 — —

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UBUNTU-CVE-2026-56001 is rated CVSS 8.5 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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