CVE-2021-30900 (GCVE-0-2021-30900)
Vulnerability from cvelistv5 – Published: 2021-08-24 18:50 – Updated: 2025-10-21 23:25Summary
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.
Severity
7.8 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- A malicious application may be able to execute arbitrary code with kernel privileges
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://support.apple.com/kb/HT212872 | x_refsource_CONFIRM |
| https://support.apple.com/en-us/HT212867 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212868 | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apple | iOS and iPadOS |
Affected:
unspecified , < 15.1
(custom)
|
|
| Apple | iOS and iPadOS |
Affected:
unspecified , < 14.8
(custom)
|
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 9a2f8a52-d17a-41e0-8407-6532c0cc9156
Exploited: Yes
Timestamps
First Seen: 2023-03-30
Asserted: 2023-03-30
Scope
Notes: KEV entry: Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability | Affected: Apple / iOS, iPadOS, and macOS | Description: Apple GPU drivers, included in iOS, iPadOS, and macOS, contain an out-of-bounds write vulnerability that may allow a malicious application to execute code with kernel privileges. | Required action: Apply updates per vendor instructions. | Due date: 2023-04-20 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.apple.com/en-us/HT21286, https://support.apple.com/en-us/HT212868, https://support.apple.com/kb/HT212872; https://nvd.nist.gov/vuln/detail/CVE-2021-30900
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-20 CWE-787 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | iOS, iPadOS, and macOS |
| Due Date | 2023-04-20 |
| Date Added | 2023-03-30 |
| Vendorproject | Apple |
| Vulnerabilityname | Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 12:27 UTC
| Updated: 2026-02-06 07:17 UTC
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c890eb98-afc0-410c-8c39-c257e0b2ce8a
Exploited: Yes
Timestamps
First Seen: 2023-03-30
Asserted: 2023-03-30
Scope
Notes: KEVIntel entry: An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS... | Affected: Apple / iOS and iPadOS | CVSS: 7.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS... |
| Vendor | Apple |
| Product | iOS and iPadOS |
| Added Date | 2023-03-30T00:00:00.000Z |
| Cvss Score | 7.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-19 12:46 UTC
| Updated: 2026-06-19 12:46 UTC
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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