What’s Vulnerable › Vulnerabilities

CVE-2020-9918

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-16 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

• macOS: before 10.15.6 — fixed in 10.15.6
• Apple tvOS: before 13.4.8 — fixed in 13.4.8
• Apple watchOS: before 6.2.8 — fixed in 6.2.8

How to fix

Upgrade to a fixed version: macOS 10.15.6; Apple tvOS 13.4.8; Apple watchOS 6.2.8. Check the vendor advisory for mitigations.

References

• https://support.apple.com/HT211288
• https://support.apple.com/HT211289
• https://support.apple.com/HT211290
• https://support.apple.com/HT211291
• https://support.apple.com/HT211288
• https://support.apple.com/HT211289
• https://support.apple.com/HT211290
• https://support.apple.com/HT211291

Get alerted when CVE-2020-9918 or the next vulnerability affects your stack