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CVE-2021-30983

Apple iOS and iPadOS Buffer Overflow

7.8 HIGHActively exploited (CISA KEV)EPSS 2.92%
  1. Published24 Aug 2021
  2. Added to CISA KEV27 Jun 2022
  3. Remediation due18 Jul 2022
Actively exploited (CISA KEV)

Apple iOS and iPadOS contain a buffer overflow vulnerability that could allow an application to execute code with kernel privileges.

Added to KEV: 27 Jun 2022Federal remediation due: 18 Jul 2022

Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Apple iPadOS< 15.2
Apple iPhone OS< 15.2

Remediation

Fixed in
Apple iPadOS≥ 15.2
Apple iPhone OS≥ 15.2

References

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Frequently asked

Is CVE-2021-30983 being actively exploited?

Yes. CVE-2021-30983 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 27 Jun 2022.

How severe is CVE-2021-30983?

CVE-2021-30983 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 2.92% probability of exploitation.

Which products are affected by CVE-2021-30983?

Affected products include Apple iPadOS, Apple iPhone OS.

How do I fix CVE-2021-30983?

Upgrade affected software to a fixed version, for example Apple iPadOS 15.2, Apple iPhone OS 15.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-30983 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.