CVE-2026-34085

MEDIUM

5.9

Description

fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.

CVE Details

CVSS v3.1 Score5.9

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/25/2026

Last Modified3/27/2026

Sourcenvd

Honeypot Sightings0

Affected Products

fontconfig_project:fontconfig

Weaknesses (CWE)

CWE-193

References

https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc(cve@mitre.org)

https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446(cve@mitre.org)

https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481(cve@mitre.org)

IOC Correlations

No correlations recorded

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