Apple iOS/iPadOS up to 16.1.2 WebKit memory allocation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Apple iOS and iPadOS up to 16.1.2 and classified as critical. Affected by this vulnerability is an unknown functionality of the component WebKit. The manipulation results in memory allocation. This vulnerability was named CVE-2022-46691. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apple iOS and iPadOS up to 16.1.2 (Smartphone Operating System). Affected is an unknown code of the component WebKit. The manipulation with an unknown input leads to a memory allocation vulnerability. CWE is classifying the issue as CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 12/13/2022 as HT213530 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is traded as CVE-2022-46691. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/29/2025). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Processing maliciously crafted web content may lead to arbitrary code execution

Upgrading to version 16.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A memory consumption issue was addressed with improved memory handling.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2023-1185). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Fedora Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
Gentoo Linux
SUSE openSUSE
Red Hat OpenShift
RESF Rocky Linux

Productinfo

Type

Smartphone Operating System

Vendor

Apple

Name

Version

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS/iPadOS 16.2

Timelineinfo

12/07/2022 🔍
12/13/2022 +6 days 🔍
12/13/2022 +0 days 🔍
12/14/2022 +1 days 🔍
11/29/2025 +1081 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213530
Status: Confirmed

CVE: CVE-2022-46691 (🔍)
GCVE (CVE): GCVE-0-2022-46691
GCVE (VulDB): GCVE-100-215688
CERT Bund: WID-SEC-2023-1185 - Red Hat Enterprise Linux: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 12/14/2022 09:13
Updated: 11/29/2025 23:41
Changes: 12/14/2022 09:13 (15), 12/14/2022 09:14 (3), 12/14/2022 09:17 (28), 01/09/2023 13:56 (2), 01/09/2023 14:02 (11), 04/22/2025 04:12 (16), 11/29/2025 23:41 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.