What is CVE-2020-9949?

CVE-2020-9949 is a high-severity vulnerability in Apple Ipados, classified under Use After Free. CVSS score: 7.8/10. Published 2020-12-08.

How severe is CVE-2020-9949?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Apple Ipados

CVE-2020-9949

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra, tvOS 14.0. An application may be able to execute arbitrary code with kernel privileges.

Vulnerability class: Use-After-Free

Published 2020-12-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.3th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

support.apple.com/en-us/HT211289 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT211843 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT211850 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT211844 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT211931 (Release Notes, Vendor Advisory)
seclists.org/fulldisclosure/2020/Dec/32 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-9949?: CVE-2020-9949 is a high-severity vulnerability in Apple Ipados, classified under Use After Free. CVSS score: 7.8/10. Published 2020-12-08.
How severe is CVE-2020-9949?: High severity. CVSS v3 base score is 7.8 out of 10.