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TI-2021-11319 Aliases CVE-2021-30952

Integer overflow in Apple watchOS

Priority CRITICAL 97Exploited in the wildCWE-190Published · 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 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Why it matters now

Exploitation Active In CISA KEV since 2026-03-05CISA due date 2026-03-26
EPSS 0.06964 94th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial watchOS (Apple): 8.3iOS and iPadOS (Apple): 15.2+1 more productRed Hat: 2 advisoriesRed Hat: 3 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
ApplewatchOSbefore 8.38.3Patch availableCNA
AppleiOS and iPadOSbefore 15.215.2Patch availableCNA
ApplemacOSbefore 12.112.1Patch availableCNA
ApplemacOSbefore 15.215.2Patch availableCNA
ApplemacOSbefore 15.215.2Patch availableCNA
  • watchOS VendorApple Affected before 8.3 Fixed in 8.3 Patch available CNA
  • iOS and iPadOS VendorApple Affected before 15.2 Fixed in 15.2 Patch available CNA
  • macOS VendorApple Affected before 12.1 Fixed in 12.1 Patch available CNA
  • macOS VendorApple Affected before 15.2 Fixed in 15.2 Patch available CNA
  • macOS VendorApple Affected before 15.2 Fixed in 15.2 Patch available CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*before 15.2VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 15.2VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 15.2VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*12.0 to before 12.1VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 15.2VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 8.3VulnerableApple
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
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:a:apple:safari:*:*:*:*:*:*:*:* Versions before 15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 12.0 to before 12.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 8.3 Vulnerable ·Apple
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 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
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:*before 2.34.4VulnerableWebKitGTK
cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:*before 2.34.4VulnerableWpewebkit
  • cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:* Versions before 2.34.4 Vulnerable ·WebKitGTK
  • cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:* Versions before 2.34.4 Vulnerable ·Wpewebkit

Remediation

  • Fix · CNA watchOS (Apple) Fixed in 8.3
  • Fix · CNA iOS and iPadOS (Apple) Fixed in 15.2
  • Fix · CNA macOS (Apple) Fixed in 12.1
  • Fix · CNA macOS (Apple) Fixed in 15.2
  • Fix · CNA macOS (Apple) Fixed in 15.2

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.

  • Advisory ·

    Apple iOS and iPadOS, macOS, watchOS — FEDORA-2022-25a98f5d55

    9 records Highest priority Priority CRITICAL 1 CRITICAL, 4 MEDIUM, 4 LOW

    Other records, highest priority first

    Show all 9 records → Advisory →
  • Advisory ·

    Apple iOS and iPadOS, macOS, watchOS — FEDORA-2022-f7366e60cb

    9 records Highest priority Priority CRITICAL 1 CRITICAL, 4 MEDIUM, 4 LOW

    Other records, highest priority first

    Show all 9 records → Advisory →
Show 2 more groups
  • Advisory ·

    Apple iOS and iPadOS, macOS, watchOS — DSA-5060

    7 records Highest priority Priority CRITICAL 1 CRITICAL, 4 MEDIUM, 2 LOW

    Other records, highest priority first

    Show all 7 records → Advisory →
  • Advisory ·

    Apple iOS and iPadOS, macOS, watchOS — DSA-5061

    7 records Highest priority Priority CRITICAL 1 CRITICAL, 4 MEDIUM, 2 LOW

    Other records, highest priority first

    Show all 7 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-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. 2026-03-05 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-30952

References

Exploit 1

Advisory 10

  • 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