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TI-2021-11230 Aliases CVE-2021-30858

Use after free in Apple macOS

Priority CRITICAL 97Exploited in the wildCWE-416Published · 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: 10 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Why it matters now

Exploitation Active In CISA KEV since 2021-11-03CISA due date 2021-11-17
EPSS 0.13379 96th percentileScored 2026-11-07
Fix Partial macOS (Apple): 11.6iOS (Apple): 14.8Red Hat: 4 advisoriesRed Hat: 10 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
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
ApplemacOSbefore 11.611.6Patch availableCNA
AppleiOSbefore 14.814.8Patch availableCNA
  • macOS VendorApple Affected before 11.6 Fixed in 11.6 Patch available CNA
  • iOS VendorApple Affected before 14.8 Fixed in 14.8 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*13.1 to before 14.8VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 12.5.5; 13.0 to before 14.8VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 11.6VulnerableApple
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions 13.1 to before 14.8 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 12.5.5; 13.0 to before 14.8 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 11.6 Vulnerable ·Apple
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA macOS (Apple) Fixed in 11.6
  • Fix · CNA iOS (Apple) Fixed in 14.8

Red Hat 4 advisories

  • RHSA-2022:0059 Released 2022-01-11 · Red Hat rating Moderate
    webkitgtk4 security update
    • Red Hat Enterprise Linux Client (v. 7) webkitgtk4-2.28.2-3.el7, webkitgtk4-jsc-2.28.2-3.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) webkitgtk4-devel-2.28.2-3.el7, webkitgtk4-doc-2.28.2-3.el7, webkitgtk4-jsc-devel-2.28.2-3.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) webkitgtk4-devel-2.28.2-3.el7, webkitgtk4-doc-2.28.2-3.el7, webkitgtk4-jsc-devel-2.28.2-3.el7
    • Red Hat Enterprise Linux Server (v. 7) webkitgtk4-2.28.2-3.el7, webkitgtk4-2.28.2-3.el7.ppc, webkitgtk4-devel-2.28.2-3.el7 +3
    • Red Hat Enterprise Linux Server Optional (v. 7) webkitgtk4-devel-2.28.2-3.el7, webkitgtk4-devel-2.28.2-3.el7.ppc, webkitgtk4-doc-2.28.2-3.el7 +2
    • Red Hat Enterprise Linux Workstation (v. 7) webkitgtk4-2.28.2-3.el7, webkitgtk4-devel-2.28.2-3.el7, webkitgtk4-jsc-2.28.2-3.el7 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) webkitgtk4-doc-2.28.2-3.el7
  • RHSA-2022:0075 Released 2022-01-11 · Red Hat rating Moderate
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) webkit2gtk3-2.24.4-4.el8_2, webkit2gtk3-devel-2.24.4-4.el8_2, webkit2gtk3-jsc-2.24.4-4.el8_2 +2
  • RHSA-2021:4686 Released 2021-11-16 · Red Hat rating Moderate
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) webkit2gtk3-2.24.4-4.el8_1, webkit2gtk3-devel-2.24.4-4.el8_1, webkit2gtk3-jsc-2.24.4-4.el8_1 +2
Show 1 more Red Hat advisories
  • RHSA-2021:4097 Released 2021-11-02 · Red Hat rating Moderate
    webkit2gtk3 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.30.4-3.el8_4, webkit2gtk3-devel-2.30.4-3.el8_4, webkit2gtk3-jsc-2.30.4-3.el8_4 +1

Fixed in the same release

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

  • Release ·

    Apple macOS 11.6

    72 records Highest priority Priority CRITICAL 4 CRITICAL, 5 MEDIUM, 63 LOW

    Other records, highest priority first

    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    • TI-2021-11373 Deserialization of untrusted data in Apple macOSPriority CRITICAL 90
    Show all 72 records →
  • Release ·

    Apple iOS 14.8

    2 records Highest priority Priority CRITICAL 2 CRITICAL

    Other records, highest priority first

    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    Show all 2 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 yet
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:4097
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2021:4686
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:0075
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:0059
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:0059
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2022:0059
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:0059
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:0059
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:0059
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:0059
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2021-11-03 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-30858

References

Advisory 13

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