CVE-2021-30900: Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

CVE-2021-30900 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2023-03-30

An out-of-bounds write vulnerability in Apple GPU drivers allows a malicious application to execute arbitrary code with kernel privileges. The issue was addressed through improved bounds checking in iOS, iPadOS, and macOS.

Technologies: Apple iPadOS, Apple macOS, Apple watchOS, Cisco IOS. Vendors: Apple, Cisco.

Quick answers

Is CVE-2021-30900 exploited in the wild?
Yes. CVE-2021-30900 is known to be exploited in the wild, first recorded on 30 March 2023. Treat it as urgent.
How severe is CVE-2021-30900?
Critical severity, with a CVSS score of 7.8, published 30 March 2023.
Which products and versions are affected?
Apple iOS up to (excluding) 14.8.1, 15.0; Apple iPadOS up to (excluding) 14.8.1, 15.0; Apple macOS Big Sur up to (excluding) 11.6.1.
Is there a fix for CVE-2021-30900?
A patch was published on 2021-10-26: Fixed in iOS 14.8.1, iPadOS 14.8.1, and macOS Big Sur 11.6.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-30900 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2021-30900?
Check whether you run Apple iPadOS, Apple macOS, Apple watchOS or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Apple iOS up to (excluding) 14.8.1, 15.0
  • Apple iPadOS up to (excluding) 14.8.1, 15.0
  • Apple macOS Big Sur up to (excluding) 11.6.1

Timeline

  • 2021-10-26: patched: Fixed in iOS 14.8.1, iPadOS 14.8.1, and macOS Big Sur 11.6.1
  • 2023-03-30: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2023-03-30: disclosed: NVD publication date

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