CVE-2019-8744 — A memory corruption issue existed in the handling of IPv6 packets

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MEDIUM

A memory corruption issue existed in the handling of IPv6 packets

Published Oct 27, 2020

5.5

MEDIUM

CVSS 3.1

EPSS 0.90%

Description

A memory corruption issue existed in the handling of IPv6 packets. This issue was addressed with improved memory management. This issue is fixed in macOS Catalina 10.15, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, watchOS 6, iOS 13. A malicious application may be able to determine kernel memory layout.

Affected products

Vendor Apple Product iOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <13
Vendor Apple Product macOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <10.15
Vendor Apple Product tvOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <13
Vendor Apple Product watchOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <6

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Apple

iOS

n/a

Version	Status	Constraints
unspecified	affected	<13

Apple

macOS

n/a

Version	Status	Constraints
unspecified	affected	<10.15

Apple

tvOS

n/a

Version	Status	Constraints
unspecified	affected	<13

Apple

watchOS

n/a

Version	Status	Constraints
unspecified	affected	<6

Remediation

No remediation recorded yet.

Metrics

0.90% 0.00899

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00899

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (9 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.90% (0.00899)	58.16th	v5 (v2026.06.15)
Sep 20, 2026	0.90% (0.00899)	58.09th	v5 (v2026.06.15)
Jul 20, 2024	0.11% (0.00113)	45.17th	v3 (v2023.03.01)
Sep 3, 2023	0.11% (0.00113)	44.00th	v3 (v2023.03.01)
Mar 7, 2023	0.08% (0.00080)	32.78th	v3 (v2023.03.01)
Mar 6, 2023	1.02% (0.01018)	40.69th	v2 (v2022.01.01)
Feb 4, 2022	1.02% (0.01018)	19.50th	v2 (v2022.01.01)
Feb 3, 2022	0.15% (0.00150)	0.54th	v5 (v2026.06.15)
Apr 14, 2021	0.15% (0.00150)	0.00th	v1

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (5)

https://support.apple.com/en-us/HT210604
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210606
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210607
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210634
x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210722
x_refsource_MISCVendor Advisory

Link	Providers	Tags
https://support.apple.com/en-us/HT210604		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210606		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210607		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210634		x_refsource_MISCVendor Advisory
https://support.apple.com/en-us/HT210722		x_refsource_MISCVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner apple

Published Oct 27, 2020

Updated Aug 4, 2024

Reserved Feb 18, 2019

Link CVE-2019-8744

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2019-8744

Red Hat

Severity n/a

Public date n/a

Links CVE-2019-8744