What is CVE-2011-0222?

CVE-2011-0222 is a vulnerability in Apple Mac OS X, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2011-07-21.

Is CVE-2011-0222 known to be exploited?

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

Buffer overflow in Apple Mac OS X

CVE-2011-0222

WebKit, as used in Apple Safari before 5.0.6, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site, a different vulnerability than other WebKit CVEs listed in APPLE-SA-2011-07-20-1.

Vulnerability class: Buffer Overflow

Published 2011-07-21 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 9.3 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.216 (97.6th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.216 · newest: 0.216 · change: 0.000

Affected products

Apple Mac OS X — versions 10.5.8, 10.6.8, 10.6.9
Apple Mac OS X Server — versions 10.5.8, 10.6.8, 10.6.9
Apple Safari — versions 1.0, 1.0.0, 1.0.0b1
Apple Webkit
Microsoft Windows 7
Microsoft Windows Vista
Microsoft Windows Xp

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

support.apple.com/kb/HT4981
lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html (vendor-advisory)
lists.apple.com/archives/Security-announce/2011//Oct/msg00000.html (vendor-advisory)
securityreason.com/securityalert/8313 (third-party-advisory)
support.apple.com/kb/HT4999
support.apple.com/kb/HT4808 (Vendor Advisory)
lists.apple.com/archives/security-announce/2011//Jul/msg00002.html (vendor-advisory, Patch, Vendor Advisory)
securityreason.com/securityalert/8315 (third-party-advisory)

Frequently asked questions

What is CVE-2011-0222?: CVE-2011-0222 is a vulnerability in Apple Mac OS X, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2011-07-21.
Is CVE-2011-0222 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.