Array index error in win32k.sys in the kernel-mode drivers in Microsoft Windows 8, Windows Server 2012 Gold and R2, and Windows RT Gold and…

published 2013-12-11 12y ago modified 2026-06-16 4mo ago also EUVD-2013-3835

cvss: 4.7; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

Array index error in win32k.sys in the kernel-mode drivers in Microsoft Windows 8, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows local users to cause a denial of service (reboot) via a crafted TrueType font (TTF) file, aka "TrueType Font Parsing Vulnerability."

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Exploit prediction

1.83% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	4.7	AV:L/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-20 Improper Input Validation

References

docs.microsoft.com /en-us/security-updates/securitybulletins/2013/ms13-101
vendor-advisory

Sources

CVE List CVE-2013-3903
NVD CVE-2013-3903

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