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TI-2023-09351 Aliases CVE-2023-23518GHSA-9cf9-qjr8-c7jw

Out-of-bounds write in Apple iOS and iPadOS

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: 4 fixed, 2 without a fix

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

Summary

The issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.6.3, macOS Ventura 13.2, watchOS 9.3, macOS Big Sur 11.7.3, Safari 16.3, tvOS 16.3, iOS 16.3 and iPadOS 16.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00902 59th percentileScored 2026-11-07
Fix Partial iOS and iPadOS (Apple): 16.3tvOS (Apple): 16.3+3 more productsRed Hat: 3 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 16.316.3Patch availableCNA
AppletvOSbefore 16.316.3Patch availableCNA
AppleSafaribefore 16.316.3Patch availableCNA
ApplemacOSbefore 11.711.7Patch availableCNA
ApplemacOSbefore 13.213.2Patch availableCNA
ApplemacOSbefore 12.612.6Patch availableCNA
ApplewatchOSbefore 9.39.3Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 16.3 Fixed in 16.3 Patch available CNA
  • tvOS VendorApple Affected before 16.3 Fixed in 16.3 Patch available CNA
  • Safari VendorApple Affected before 16.3 Fixed in 16.3 Patch available CNA
  • macOS VendorApple Affected before 11.7 Fixed in 11.7 Patch available CNA
  • macOS VendorApple Affected before 13.2 Fixed in 13.2 Patch available CNA
  • macOS VendorApple Affected before 12.6 Fixed in 12.6 Patch available CNA
  • watchOS VendorApple Affected before 9.3 Fixed in 9.3 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*before 16.3VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 16.3VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 16.3VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 11.7.3; 12.0 to before 12.6.3; 13.0 to before 13.2VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 16.3VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 9.3VulnerableApple
  • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 16.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 16.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 16.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 11.7.3; 12.0 to before 12.6.3; 13.0 to before 13.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 16.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 9.3 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 16.3
  • Fix · CNA tvOS (Apple) Fixed in 16.3
  • Fix · CNA Safari (Apple) Fixed in 16.3
  • Fix · CNA macOS (Apple) Fixed in 11.7
  • Fix · CNA macOS (Apple) Fixed in 13.2
  • Fix · CNA macOS (Apple) Fixed in 12.6
  • Fix · CNA watchOS (Apple) Fixed in 9.3

Red Hat 3 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-2023:2834 Released 2023-05-16 · Red Hat rating Important
    webkit2gtk3 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.38.5-1.el8, webkit2gtk3-devel-2.38.5-1.el8, webkit2gtk3-jsc-2.38.5-1.el8 +1
  • RHSA-2023:2256 Released 2023-05-09 · Red Hat rating Important
    webkit2gtk3 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3-2.38.5-1.el9, webkit2gtk3-devel-2.38.5-1.el9, webkit2gtk3-jsc-2.38.5-1.el9 +1

Fixed in the same release

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

  • Release ·

    Apple macOS 13.2

    28 records Highest priority Priority CRITICAL 1 CRITICAL, 6 MEDIUM, 21 LOW

    Other records, highest priority first

    • TI-2023-09361 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2023-09347 Buffer overflow in Apple macOSPriority MEDIUM 52
    • TI-2023-09363 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 43
    Show all 28 records →
  • Release ·

    Apple macOS 12.6

    19 records Highest priority Priority MEDIUM 4 MEDIUM, 15 LOW

    Other records, highest priority first

    • TI-2023-09347 Buffer overflow in Apple macOSPriority MEDIUM 52
    • TI-2022-23108 Out-of-bounds write in Apple macOSPriority MEDIUM 51
    • TI-2023-09350 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 42
    Show all 19 records →
Show 5 more groups
  • Release ·

    Apple iOS and iPadOS 16.3

    19 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2023-09361 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2023-09363 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2023-09350 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 42
    Show all 19 records →
  • Release ·

    Apple watchOS 9.3

    14 records Highest priority Priority MEDIUM 4 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2023-09350 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2023-09331 Code injection in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2023-09352 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 14 records →
  • Release ·

    Apple macOS 11.7

    14 records Highest priority Priority MEDIUM 4 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2023-09347 Buffer overflow in Apple macOSPriority MEDIUM 52
    • TI-2022-23108 Out-of-bounds write in Apple macOSPriority MEDIUM 51
    • TI-2023-09350 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 42
    Show all 14 records →
  • Release ·

    Apple tvOS 16.3

    13 records Highest priority Priority MEDIUM 4 MEDIUM, 9 LOW

    Other records, highest priority first

    • TI-2023-09350 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2023-09331 Code injection in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2023-09352 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 13 records →
  • Release ·

    Apple Safari 16.3

    4 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM

    Other records, highest priority first

    • TI-2023-09361 Type confusion in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2023-09350 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2023-09331 Code injection in Apple iOS and iPadOSPriority MEDIUM 42
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Important. 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 yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:2834
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:2256
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

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-23518
  2. 2026-10-03 Alias added: GHSA-9cf9-qjr8-c7jw

References

Advisory 7

Other 1

  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
See all 2382 →

Sources

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