What is CVE-2019-8755?

CVE-2019-8755 is a high-severity vulnerability in Apple macOS, classified under NULL Pointer Dereference. CVSS score: 7.8/10. Published 2019-12-18.

How severe is CVE-2019-8755?

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

NULL pointer dereference in Apple macOS

CVE-2019-8755

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Catalina 10.15. A malicious application may be able to determine kernel memory layout.

Published 2019-12-18 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.004 (29.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

support.apple.com/HT210634 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8755?: CVE-2019-8755 is a high-severity vulnerability in Apple macOS, classified under NULL Pointer Dereference. CVSS score: 7.8/10. Published 2019-12-18.
How severe is CVE-2019-8755?: High severity. CVSS v3 base score is 7.8 out of 10.