What is CVE-2009-0946?

CVE-2009-0946 is a vulnerability in Apple Iphone OS, classified under Integer Overflow or Wraparound. Published 2009-04-17.

Is CVE-2009-0946 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Apple Iphone OS

CVE-2009-0946

Multiple integer overflows in FreeType 2.3.9 and earlier allow remote attackers to execute arbitrary code via vectors related to large values in certain inputs in (1) smooth/ftsmooth.c, (2) sfnt/ttcmap.c, and (3) cff/cffload.c.

Vulnerability class: Integer Overflow

Published 2009-04-17 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.085 (94.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.085 · newest: 0.085 · change: 0.000

Affected products

Apple Iphone OS
Apple Mac OS X — versions 10.4.11, 10.5.8
Apple Mac OS X Server — versions 10.4.11, 10.5.8
Apple Safari — versions 4.0
Freetype
Canonical Ubuntu Linux — versions 6.06, 8.04, 8.10
Debian Linux — versions 4.0, 5.0, 6.0
openSUSE — versions 10.3, 11.0, 11.1
SUSE Linux Enterprise Server — versions 10, 11

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

secunia.com/advisories/34967 (Third Party Advisory, third-party-advisory)
support.apple.com/kb/HT3639 (Third Party Advisory)
support.apple.com/kb/HT4435 (Broken Link)
secunia.com/advisories/34913 (Third Party Advisory, third-party-advisory)
git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/ (Patch, Third Party Advisory)
www.vupen.com/english/advisories/2009/1621 (Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/34550 (VDB Entry, Third Party Advisory, vdb-entry)
support.apple.com/kb/HT3549 (Third Party Advisory)
www.mandriva.com/security/advisories (vendor-advisory, Third Party Advisory)
lists.apple.com/archives/security-announce/2009/jun/msg00002.html (vendor-advisory, Broken Link)

Frequently asked questions

What is CVE-2009-0946?: CVE-2009-0946 is a vulnerability in Apple Iphone OS, classified under Integer Overflow or Wraparound. Published 2009-04-17.
Is CVE-2009-0946 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.