Integer overflow in Apple Ios And Ipados
CVE-2021-30952
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 c…
Vulnerability class: Integer Overflow
EPSS: 0.076 (93.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Apple Ios And Ipados — versions unspecified
- Apple Ipados
- Apple Iphone_os
- Apple Macos — versions unspecified
- Apple Safari
- Apple Tvos
- Apple Watchos — versions unspecified
- Webkitgtk
- Wpewebkit Wpe_webkit
- Debian Debian_linux — versions 10.0, 11.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- product-security@apple.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- product-security@apple.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- product-security@apple.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- product-security@apple.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- product-security@apple.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- product-security@apple.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- product-security@apple.com (x_refsource_FEDORA, vendor-advisory, Broken Link)
- product-security@apple.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_DEBIAN)
- product-security@apple.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_DEBIAN)
- product-security@apple.com (x_refsource_FEDORA, vendor-advisory, Broken Link)
Frequently asked questions
- What is CVE-2021-30952?
- CVE-2021-30952 is a high-severity vulnerability in Apple Ios And Ipados, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2021-08-24.
- How severe is CVE-2021-30952?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-30952 known to be exploited?
- Yes. CVE-2021-30952 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-05), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.