Apple tvOS up to 15.1.1 Kernel use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple tvOS up to 15.1.1. Affected is an unknown function of the component Kernel. This manipulation causes use after free. The identification of this vulnerability is CVE-2021-30927. The attack can only be executed locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple tvOS up to 15.1.1 (Digital Media Player). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Kernel. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was shared 12/13/2021 by Xinru Chi as HT212980 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2021-30927. The technical details are unknown and an exploit is not publicly available. The advisory points out:

An application may be able to execute arbitrary code with kernel privileges

Upgrading to version 15.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A use after free issue was addressed with improved memory management.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0631). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Apple macOS

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: tvOS 15.2

Timelineinfo

04/13/2021 🔍
12/13/2021 +244 days 🔍
12/13/2021 +0 days 🔍
12/17/2021 +4 days 🔍
03/06/2026 +1540 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT212980
Researcher: Xinru Chi
Status: Confirmed

CVE: CVE-2021-30927 (🔍)
GCVE (CVE): GCVE-0-2021-30927
GCVE (VulDB): GCVE-100-188539
CERT Bund: WID-SEC-2026-0631 - Apple macOS: Mehrere Schwachstellen

Entryinfo

Created: 12/17/2021 16:31
Updated: 03/06/2026 18:44
Changes: 12/17/2021 16:31 (19), 12/17/2021 16:34 (27), 12/23/2021 08:31 (1), 03/06/2026 18:44 (21)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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