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TI-2021-11174 Aliases CVE-2021-30797GHSA-q239-wm45-8mwc

Apple iOS: Processing maliciously crafted web content may lead to code execution

Priority MEDIUM 42Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
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.

Summary

This issue was addressed with improved checks. This issue is fixed in iOS 14.7, Safari 14.1.2, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7. Processing maliciously crafted web content may lead to code execution.

Why it matters now

EPSS 0.01867 79th percentileScored 2026-11-07
Fix Partial iOS (Apple): 14.7macOS (Apple): 11.5, 14.7, 7.6 +1Red 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
AppleiOSbefore 14.714.7Patch availableCNA
ApplemacOSbefore 11.511.5Patch availableCNA
ApplemacOSbefore 14.714.7Patch availableCNA
ApplemacOSbefore 7.67.6Patch availableCNA
ApplemacOSbefore 14.114.1Patch availableCNA
  • iOS VendorApple Affected before 14.7 Fixed in 14.7 Patch available CNA
  • macOS VendorApple Affected before 11.5 Fixed in 11.5 Patch available CNA
  • macOS VendorApple Affected before 14.7 Fixed in 14.7 Patch available CNA
  • macOS VendorApple Affected before 7.6 Fixed in 7.6 Patch available CNA
  • macOS VendorApple Affected before 14.1 Fixed in 14.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*before 14.1.2VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.7VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.7VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 11.5VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.7VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.6VulnerableApple
  • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 14.1.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 11.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.6 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS (Apple) Fixed in 14.7
  • Fix · CNA macOS (Apple) Fixed in 11.5
  • Fix · CNA macOS (Apple) Fixed in 14.7
  • Fix · CNA macOS (Apple) Fixed in 7.6
  • Fix · CNA macOS (Apple) Fixed in 14.1

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-2021:4381 Released 2021-11-09 · Red Hat rating Moderate
    GNOME security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) LibRaw-devel-0.19.5-3.el8
    • Red Hat Enterprise Linux AppStream (v. 8) LibRaw-0.19.5-3.el8, gnome-autoar-0.2.3-2.el8, webkit2gtk3-2.32.3-2.el8 +3

Fixed in the same release

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

  • Release ·

    Apple macOS 11.5

    35 records Highest priority Priority MEDIUM 6 MEDIUM, 29 LOW

    Other records, highest priority first

    • TI-2021-11181 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 48
    • TI-2021-11171 Apple Security Update - Catalina: An application may be able to execute arbitrary code…Priority MEDIUM 48
    • TI-2021-11176 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 42
    Show all 35 records →
  • Release ·

    Apple iOS 14.7

    29 records Highest priority Priority MEDIUM 5 MEDIUM, 24 LOW

    Other records, highest priority first

    • TI-2021-11176 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 42
    • TI-2021-11172 Use after free in Apple iOSPriority MEDIUM 42
    • TI-2021-11178 Use after free in Apple iOSPriority MEDIUM 41
    Show all 29 records →
Show 3 more groups
  • Release ·

    Apple macOS 7.6

    16 records Highest priority Priority MEDIUM 3 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2021-11172 Use after free in Apple iOSPriority MEDIUM 42
    • TI-2021-11136 Type confusion in Apple iOSPriority MEDIUM 41
    • TI-2021-11163 Buffer overflow in Apple Security Update - CatalinaPriority LOW 38
    Show all 16 records →
  • Release ·

    Apple macOS 14.7

    15 records Highest priority Priority MEDIUM 3 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2021-11172 Use after free in Apple iOSPriority MEDIUM 42
    • TI-2021-11136 Type confusion in Apple iOSPriority MEDIUM 41
    • TI-2021-11163 Buffer overflow in Apple Security Update - CatalinaPriority LOW 38
    Show all 15 records →
  • Release ·

    Apple macOS 14.1

    11 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2021-11048 Integer overflow in Apple macOSPriority CRITICAL 97
    • TI-2021-11172 Use after free in Apple iOSPriority MEDIUM 42
    • TI-2021-11115 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 42
    Show all 11 records →

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-2021:4381
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: 4 products
  • Red Hat CodeReady Linux Builder (v. 8)
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux BaseOS (v. 8)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30797
  2. 2026-10-03 Alias added: GHSA-q239-wm45-8mwc

References

Advisory 5

  • 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