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.…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 19 Jul 2011. It cites 2 public reports, the first from 19 Jul 2011.

• cve.org
• trendmicro.com

How likely is exploitation in the next 30 days?

6.6%

EPSS score, percentile 93.9 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

Not scored

The CVE record carries no CVSS score.

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (8)

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 30 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

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.

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

• APPLE-SA-2011-07-15-1 (Vendor advisory)
• openSUSE-SU-2011:0852 (Vendor advisory)
• APPLE-SA-2011-07-15-2 (Vendor advisory)
• APPLE-SA-2011-10-12-3 (Vendor advisory)
• RHSA-2011:1085 (Vendor advisory)
• SUSE-SU-2011:0853 (Vendor advisory)
• DSA-2294 (Vendor advisory)
• MDVSA-2011:120 (Vendor advisory)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List, as of 30 Oct 2026. About the data.

Timeline

Known exploited Apple vulnerabilities

• CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability (added 29 Sep 2026)
• CVE-2026-65400: Apple macOS Improper Authentication Vulnerability (added 18 Aug 2026)
• CVE-2025-31277: Apple Multiple Products Buffer Overflow Vulnerability (added 20 Mar 2026)
• CVE-2025-43510: Apple Multiple Products Improper Locking Vulnerability (added 20 Mar 2026)
• CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability (added 20 Mar 2026)