A flaw was found in the libXfont2 font-server client. A remote attacker, by operating a malicious font server, could exploit an out-of-bounds read/write vulnerability. This occurs because the client incorrectly handles font data, leading to an out-of-bounds memory access. This can lead to privilege escalation if the X server runs with root privileges, or a denial of service (crash) if it runs as an unprivileged user.

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Fixes

Solution

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Workaround

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History

Thu, 06 Aug 2026 13:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-787

Thu, 06 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in the libXfont2 font-server client. A remote attacker, by operating a malicious font server, could exploit an out-of-bounds read/write vulnerability. This occurs because the client incorrectly handles font data, leading to an out-of-bounds memory access. This can lead to privilege escalation if the X server runs with root privileges, or a denial of service (crash) if it runs as an unprivileged user.
Title libxfont2: Font Server Client encoding[] Out-Of-Bounds Read/Write
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

threat_severity

Important


Projects

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cve-icon MITRE

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cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

Severity : Important

Publid Date: 2026-08-05T10:00:00Z

Links: CVE-2026-59679 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-06T13:30:02Z

Weaknesses