CVE-2021-30952
HighActively exploited (CISA KEV)
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Apple Multiple Products
PublishedAug 24, 2021
First seenAug 24, 2021
Added to KEVMar 5, 2026
Weakness typeCWE-190Integer overflow
How to fix
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: Mar 26, 2026Update
- apple safari15.2 or later
- apple ipados15.2 or later
- apple iphone_os15.2 or later
- apple macos12.1 or later
- apple tvos15.2 or later
- apple watchos8.3 or later
- webkitgtk webkitgtk2.34.4 or later
- wpewebkit wpe_webkit2.34.4 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/
- debian.org/security/2022/dsa-5061
- debian.org/security/2022/dsa-5060
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple safari | v < 15.2 | 15.2 |
| apple ipados | v < 15.2 | 15.2 |
| apple iphone_os | v < 15.2 | 15.2 |
| apple macos | 12.0 ≤ v < 12.1 | 12.1 |
| apple tvos | v < 15.2 | 15.2 |
| apple watchos | v < 8.3 | 8.3 |
| fedoraproject fedora | 34, 35 | — |
| debian debian_linux | 10.0, 11.0 | — |
| webkitgtk webkitgtk | v < 2.34.4 | 2.34.4 |
| wpewebkit wpe_webkit | v < 2.34.4 | 2.34.4 |
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