# CVE-2023-42917: Apple Multiple Products WebKit Memory Corruption Vulnerability

> CVE-2023-42917: Apple Multiple Products WebKit Memory Corruption Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-42917
Last updated: 2025-10-21T23:05:31Z

- Published: 2023-11-30 22:18 UTC · Updated: 2025-10-21 23:05 UTC · Assigner: apple
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 9.3%, 95th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-12-04, federal due date 2023-12-25, ransomware use: Unknown

## Description

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

## CISA required action

Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

## Affected vendors and products

- Apple: iOS and iPadOS
- Apple: macOS
- Apple: Safari

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-42917)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-42917)
- [http://seclists.org/fulldisclosure/2023/Dec/12](http://seclists.org/fulldisclosure/2023/Dec/12)
- [http://seclists.org/fulldisclosure/2023/Dec/13](http://seclists.org/fulldisclosure/2023/Dec/13)
- [http://seclists.org/fulldisclosure/2023/Dec/3](http://seclists.org/fulldisclosure/2023/Dec/3)
- [http://seclists.org/fulldisclosure/2023/Dec/4](http://seclists.org/fulldisclosure/2023/Dec/4)
- [http://seclists.org/fulldisclosure/2023/Dec/5](http://seclists.org/fulldisclosure/2023/Dec/5)
- [http://seclists.org/fulldisclosure/2023/Dec/8](http://seclists.org/fulldisclosure/2023/Dec/8)
- [http://seclists.org/fulldisclosure/2024/Jan/35](http://seclists.org/fulldisclosure/2024/Jan/35)
- [https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/)
- [https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/)
- [https://security.gentoo.org/glsa/202401-04](https://security.gentoo.org/glsa/202401-04)
- [https://support.apple.com/en-us/HT214031](https://support.apple.com/en-us/HT214031)
- [https://support.apple.com/en-us/HT214032](https://support.apple.com/en-us/HT214032)
- [https://support.apple.com/en-us/HT214033](https://support.apple.com/en-us/HT214033)
- [https://support.apple.com/kb/HT214033](https://support.apple.com/kb/HT214033)
- [https://support.apple.com/kb/HT214034](https://support.apple.com/kb/HT214034)
- [https://support.apple.com/kb/HT214062](https://support.apple.com/kb/HT214062)
- [https://www.debian.org/security/2023/dsa-5575](https://www.debian.org/security/2023/dsa-5575)
- [http://www.openwall.com/lists/oss-security/2023/12/05/1](http://www.openwall.com/lists/oss-security/2023/12/05/1)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-42917 · Markdown: https://rewindex.com/cve/CVE-2023-42917.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-42917 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:11:26.292Z