CVE-2026-34085

Published: Mar 25, 2026 Last Modified: Mar 25, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,9
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: low

Description

AI Translation Available

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.

193

Off-by-one Error

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Instability Modify Memory Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Languages: C, Not Language-Specific
View CWE Details
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/comm…
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5…
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merg…
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work…
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481