Apple · iOS
CVE-2016-4656
Apple iOS Memory Corruption Vulnerability
Exploited in attacks
High 7.8 Attack chance: 24%
What it is
The kernel in Apple iOS before 9.3.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.
CISA: A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: June 14, 2022
- Added to the CISA list
- May 24, 2022
- Published
- August 25, 2016
- Severity
- High 7.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 24% in the top 2.2% of all known vulnerabilities
- Weakness
- CWE-264
- More details
- NVD · CVE.org · CISA
All references (6)
More exploited flaws from Apple
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Dec 14, 2022 | Type Confusion | iOS | High 8.8 | 8.5% |
| May 24, 2022 | Information Disclosure | iOS | Medium 5.5 | 33% |
| May 24, 2022 | Webkit Memory Corruption | iOS | High 8.8 | 67% |
| May 23, 2022 | Memory Corruption | iOS | High 7.8 | 4.6% |
| Nov 3, 2021 | WebKit Buffer Overflow | iOS | High 8.8 | 3.0% |
| Nov 3, 2021 | WebKit Memory Corruption | iOS | High 8.8 | 11% |
| Nov 3, 2021 | WebKit Use-After-Free | iOS | High 8.8 | 11% |
| Sep 29, 2026 | Out-of-Bounds Write | Multiple Products | High 8.8 | 26% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.