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TI-2020-08053 Aliases CVE-2020-9983GHSA-6c43-4qm7-f3r6

Out-of-bounds write in Apple Safari

Priority MEDIUM 42CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 3 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to code execution.

Why it matters now

EPSS 0.02201 82nd percentileScored 2026-11-07
Fix Partial Safari (Apple): Safari 14.0Red Hat: 2 advisoriesRed Hat: 3 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleSafaribefore Safari 14.0Safari 14.0Patch availableCNA
  • Safari VendorApple Affected before Safari 14.0 Fixed in Safari 14.0 Patch available CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:a:apple:icloud:11.5:*:*:*:*:windows:*:*11.5VulnerableApple
cpe:2.3:a:apple:itunes:12.10.9:*:*:*:*:windows:*:*12.10.9VulnerableApple
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*before 14.0VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.0VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.0VulnerableApple
cpe:2.3:o:apple:tvos:14.0:*:*:*:*:*:*:*14.0VulnerableApple
cpe:2.3:o:apple:watchos:7.0:*:*:*:*:*:*:*7.0VulnerableApple
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
  • cpe:2.3:a:apple:icloud:11.5:*:*:*:*:windows:*:* Versions 11.5 Vulnerable ·Apple
  • cpe:2.3:a:apple:itunes:12.10.9:*:*:*:*:windows:*:* Versions 12.10.9 Vulnerable ·Apple
  • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:14.0:*:*:*:*:*:*:* Versions 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Apple
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject

Remediation

  • Fix · CNA Safari (Apple) Fixed in Safari 14.0

Red Hat 2 advisories

  • RHSA-2025:10364 Released 2025-07-07 · Red Hat rating Important
    webkitgtk4 security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.48.3-2.el7_9, webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-jsc-2.48.3-2.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-doc-2.48.3-2.el7_9, webkitgtk4-jsc-devel-2.48.3-2.el7_9
  • RHSA-2021:1586 Released 2021-05-18 · Red Hat rating Moderate
    GNOME security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) glib2-doc-2.56.4-9.el8, glib2-static-2.56.4-9.el8
    • Red Hat Enterprise Linux AppStream (v. 8) gdm-1:3.28.3-39.el8, webkit2gtk3-2.30.4-1.el8, webkit2gtk3-devel-2.30.4-1.el8 +2
    • Red Hat Enterprise Linux BaseOS (v. 8) glib2-2.56.4-9.el8, glib2-devel-2.56.4-9.el8, glib2-fam-2.56.4-9.el8 +1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Apple Safari — DSA-4797

    3 records Highest priority Priority MEDIUM 3 MEDIUM

    Other records, highest priority first

    Show all 3 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:1586
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:10364
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2025:10364
Not affected: 3 products
  • Red Hat CodeReady Linux Builder (v. 8)
  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux BaseOS (v. 8)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-9983
  2. 2026-10-03 Alias added: GHSA-6c43-4qm7-f3r6

References

Advisory 15

  • TI-2019-06084 Type confusion in Apple iOS KEVCVSS 3.1HIGH 8.8
  • TI-2020-16987 Type confusion in Apple watchOS KEVCVSS 3.1HIGH 7.8
  • TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code execution CVSS 3.1CRITICAL 9.8
  • TI-2018-03187 Memory corruption in Apple WebKit CVSS 3.1HIGH 8.8
  • TI-2018-03118 Memory corruption in Apple WebKit CVSS 3.0HIGH 8.8
  • TI-2018-03361 Memory corruption in iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows CVSS 3.0HIGH 8.8
See all 448 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences