CVE-2019-8763 — webkitgtk: Multiple memory corruption issues leading to arbitrary code execution

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HIGH

webkitgtk: Multiple memory corruption issues leading to arbitrary code execution

Published Dec 18, 2019

8.8

HIGH

CVSS 3.1

EPSS 1.89%

Description

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 13.1 and iPadOS 13.1, tvOS 13, Safari 13.0.1, iTunes for Windows 12.10.1, iCloud for Windows 10.7, iCloud for Windows 7.14. Processing maliciously crafted web content may lead to arbitrary code execution.

Affected products

Vendor Apple Product Safari Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <Safari 13.0.1
Vendor Apple Product iCloud for Windows Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iCloud for Windows 10.7
Vendor Apple Product iCloud for Windows (Legacy) Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iCloud for Windows 7.14
Vendor Apple Product iOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iOS 13.1 and iPadOS 13.1
Vendor Apple Product iTunes for Windows Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iTunes for Windows 12.10.1
Vendor Apple Product tvOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <tvOS 13

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

Safari

n/a

Version	Status	Constraints
unspecified	affected	<Safari 13.0.1

Apple

iCloud for Windows

n/a

Version	Status	Constraints
unspecified	affected	<iCloud for Windows 10.7

Apple

iCloud for Windows (Legacy)

n/a

Version	Status	Constraints
unspecified	affected	<iCloud for Windows 7.14

Apple

iOS

n/a

Version	Status	Constraints
unspecified	affected	<iOS 13.1 and iPadOS 13.1

Apple

iTunes for Windows

n/a

Version	Status	Constraints
unspecified	affected	<iTunes for Windows 12.10.1

Apple

tvOS

n/a

Version	Status	Constraints
unspecified	affected	<tvOS 13

Red Hat Enterprise Linux 7

webkitgtk4-0:2.28.2-2.el7

Fixed · RHSA-2020:4035
Red Hat Enterprise Linux 8

webkit2gtk3-0:2.24.4-2.el8_1

Fixed · RHEA-2019:4262
Red Hat Enterprise Linux 6

webkitgtk

Out of support scope
Red Hat Enterprise Linux 7

webkitgtk3

Will not fix

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	webkitgtk4-0:2.28.2-2.el7	Fixed	RHSA-2020:4035
Red Hat Enterprise Linux 8	webkit2gtk3-0:2.24.4-2.el8_1	Fixed	RHEA-2019:4262
Red Hat Enterprise Linux 6	webkitgtk	Out of support scope	n/a
Red Hat Enterprise Linux 7	webkitgtk3	Will not fix	n/a

Remediation

No remediation recorded yet.

Metrics

1.89% 0.01892

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

EPSS probability 0.01892

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3
EPSS v4

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3
EPSS v4

Table of values (15 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	1.89% (0.01892)	78.84th	v5 (v2026.06.15)
Jun 15, 2026	1.91% (0.01908)	77.01th	v5 (v2026.06.15)
Jun 21, 2025	1.49% (0.01485)	80.11th	v4 (v2025.03.14)
Jul 20, 2024	0.50% (0.00502)	76.60th	v3 (v2023.03.01)
Feb 8, 2024	0.50% (0.00502)	75.71th	v3 (v2023.03.01)
Oct 22, 2023	0.50% (0.00502)	73.67th	v3 (v2023.03.01)
Oct 7, 2023	0.36% (0.00364)	69.16th	v3 (v2023.03.01)
Mar 7, 2023	0.35% (0.00348)	67.22th	v3 (v2023.03.01)
Mar 6, 2023	1.84% (0.01843)	77.19th	v2 (v2022.01.01)
Apr 1, 2022	1.84% (0.01843)	75.13th	v2 (v2022.01.01)
Feb 4, 2022	18.17% (0.18168)	93.50th	v2 (v2022.01.01)
Feb 3, 2022	1.04% (0.01043)	28.33th	v5 (v2026.06.15)
Jan 6, 2022	1.04% (0.01043)	27.70th	v1
Sep 1, 2021	0.23% (0.00234)	4.34th	v1
Apr 14, 2021	0.23% (0.00234)	0.00th	v1

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (9)

https://access.redhat.com/security/cve/CVE-2019-8763
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1876615
Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2019-8763
https://security.gentoo.org/glsa/202003-22
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://support.apple.com/HT210635
x_refsource_MISCVendor Advisory
https://support.apple.com/HT210636
x_refsource_MISCVendor Advisory
https://support.apple.com/HT210637
x_refsource_MISCVendor Advisory
https://webkitgtk.org/security/WSA-2019-0005.html
https://www.cve.org/CVERecord?id=CVE-2019-8763

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2019-8763		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1876615		Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2019-8763
https://security.gentoo.org/glsa/202003-22		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://support.apple.com/HT210635		x_refsource_MISCVendor Advisory
https://support.apple.com/HT210636		x_refsource_MISCVendor Advisory
https://support.apple.com/HT210637		x_refsource_MISCVendor Advisory
https://webkitgtk.org/security/WSA-2019-0005.html
https://www.cve.org/CVERecord?id=CVE-2019-8763