Vulnerability · CVE-2021-30983
Apple iOS and iPadOS Buffer Overflow Vulnerability
Published Aug 24, 2021 · catalog updated Jun 16, 2026 · Apple iOS and iPadOS
Patch now
CVE-2021-30983 is in the CISA known-exploited catalog, due Jul 18, 2022. Confirm Apple iOS and iPadOS against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- Severity
- High7.8
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 2.92%
- Remediation
- Remediation guidance
- Affected products
- cpe apple/ipados · cpe apple/iphone os · vendor Apple iOS and iPadOS
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe apple/ipadosversion unspecified
- cpe apple/iphone osversion unspecified
- vendor Apple iOS and iPadOSversion unspecified
How to fix CVE-2021-30983
Recommended remediation
Apply updates per vendor instructions. CISA due date Jul 18, 2022.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2021-30983 is in the CISA known-exploited catalog, due Jul 18, 2022. Confirm Apple iOS and iPadOS against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Affected version ranges are not on this record. Apply updates per vendor instructions.
What should an analyst verify?
CWE-119: Buffer Overflow; CWE-120: Classic Buffer Overflow. EPSS 2.92%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Aug 24, 2021 · Catalog
Detected
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.
Jun 27, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Jul 18, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
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.
Sources
- CISA KEVConfirmed exploitationCVE-2021-30983
Apple iOS and iPadOS contain a buffer overflow vulnerability that could allow an application to execute code with kernel privileges.
cisa.gov - CVE.orgVulnerability recordCVE-2021-30983
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2021-30983
30-day exploitation probability 2.9%
first.org - NIST NVDVulnerability recordCVE-2021-30983
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.
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-2021-30983
Apple iOS and iPadOS contain a buffer overflow vulnerability that could allow an application to execute code with kernel privileges.
vulncheck.com
References
Freshness
Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.