CVE-2011-0226

CVE-2011-0226 is a critical-severity vulnerability in Apple Iphone Os with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 7% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-189
• Affected product: Apple Iphone Os
• Published: 2011-07-19
• Last modified: 2026-06-16

Description

Integer signedness error in psaux/t1decode.c in FreeType before 2.4.6, as used in CoreGraphics in Apple iOS before 4.2.9 and 4.3.x before 4.3.4 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted Type 1 font in a PDF document, as exploited in the wild in July 2011.

Frequently asked questions

What is CVE-2011-0226?

Integer signedness error in psaux/t1decode.c in FreeType before 2.4.6, as used in CoreGraphics in Apple iOS before 4.2.9 and 4.3.x before 4.3.4 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted Type 1 font in a PDF document, as exploited in the wild in July 2011.

How severe is CVE-2011-0226?

CVE-2011-0226 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-0226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0226?

CVE-2011-0226 primarily affects Apple Iphone Os. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0226?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-0226 published?

CVE-2011-0226 was published on 2011-07-19 and last updated on 2026-06-16.

References

• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
• http://lists.apple.com/archives/security-announce/2011//Jul/msg00000.html
• http://lists.apple.com/archives/security-announce/2011//Jul/msg00001.html
• http://lists.nongnu.org/archive/html/freetype-devel/2011-07/msg00014.html
• http://lists.nongnu.org/archive/html/freetype-devel/2011-07/msg00015.html
• http://lists.nongnu.org/archive/html/freetype-devel/2011-07/msg00020.html
• http://lists.nongnu.org/archive/html/freetype-devel/2011-07/msg00026.html
• http://lists.nongnu.org/archive/html/freetype-devel/2011-07/msg00028.html
• http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00015.html
• http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00016.html
• http://secunia.com/advisories/45167
• http://secunia.com/advisories/45224
• http://support.apple.com/kb/HT4802
• http://support.apple.com/kb/HT4803
• http://support.apple.com/kb/HT5002
• http://www.appleinsider.com/articles/11/07/06/hackers_release_new_browser_based_ios_jailbreak_based_on_pdf_exploit.html
• http://www.debian.org/security/2011/dsa-2294
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:120
• http://www.redhat.com/support/errata/RHSA-2011-1085.html
• http://www.securityfocus.com/bid/48619

Affected products (58)

• cpe:2.3:a:freetype:freetype:*:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.2.10:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.3:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.4:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.5:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.6:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.7:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.8:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.9:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.10:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.11:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.3.12:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:freetype:freetype:2.4.4:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.3:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.4:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:1.1.5:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.0:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.2:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:2.2.1:*:*:*:*:*:*:*
• cpe:2.3:o:apple:iphone_os:3.0:*:*:*:*:*:*:*

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