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TI-2021-11254 Aliases CVE-2021-30884

The issue was resolved with additional restrictions on CSS compositing.

Priority LOW 24Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · None
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

The issue was resolved with additional restrictions on CSS compositing. This issue is fixed in tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Visiting a maliciously crafted website may reveal a user's browsing history.

Why it matters now

EPSS 0.0115 67th percentileScored 2026-11-07
Fix Partial iOS and iPadOS (Apple): 15tvOS (Apple): 15+1 more productRed 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
AppleiOS and iPadOSbefore 1515Patch availableCNA
AppletvOSbefore 1515Patch availableCNA
ApplewatchOSbefore 88Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 15 Fixed in 15 Patch available CNA
  • tvOS VendorApple Affected before 15 Fixed in 15 Patch available CNA
  • watchOS VendorApple Affected before 8 Fixed in 8 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 15.0VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 15.0VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 12.0.1VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 15.0VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 8.0VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 12.0.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 8.0 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 15
  • Fix · CNA tvOS (Apple) Fixed in 15
  • Fix · CNA watchOS (Apple) Fixed in 8

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-2022:1777 Released 2022-05-10 · Red Hat rating Moderate
    webkit2gtk3 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.34.6-1.el8, webkit2gtk3-devel-2.34.6-1.el8, webkit2gtk3-jsc-2.34.6-1.el8 +1

Fixed in the same release

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

  • Release ·

    Apple iOS and iPadOS 15

    14 records Highest priority Priority MEDIUM 4 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2021-11223 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2021-11371 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 14 records →
  • Release ·

    Apple watchOS 8

    8 records Highest priority Priority MEDIUM 4 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2021-11223 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2021-11292 Incorrect authorization in Apple macOSPriority MEDIUM 42
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 8 records →
Show 1 more group
  • Release ·

    Apple tvOS 15

    6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2021-11223 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2021-11226 Apple iOS and iPadOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 40
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Low. 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-2022:1777
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: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30884

References

Other 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