What is CVE-2019-8641?

CVE-2019-8641 is a critical-severity vulnerability in Apple iOS, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-12-18.

How severe is CVE-2019-8641?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2019-8641 known to be exploited?

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

Out-of-bounds Read in Apple iOS

CVE-2019-8641

An out-of-bounds read was addressed with improved input validation.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.170 (97.0th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.170 · newest: 0.170 · change: 0.000

Affected products

Apple iOS — versions unspecified
Apple Iphone OS
Apple macOS — versions unspecified
Apple Mac OS X
Apple tvOS
Apple watchOS — versions unspecified

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-8641?: CVE-2019-8641 is a critical-severity vulnerability in Apple iOS, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-12-18.
How severe is CVE-2019-8641?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-8641 known to be exploited?: 27 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.