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CVE-2023-42917

HIGH · CVSS 8.8 · Analyzed

Published: 2023-11-30 · Updated: 2026-06-17 · Source: NVD

Stored catalog record

Source record retrieved 2026-10-28T14:21:59.970731+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.

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Vulnerability overview

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.

Patch review priority

Known exploitation: prioritize review

  • CISA KEV lists real-world exploitation.

FIRST EPSS: 9.29% · percentile 95.3 · score date 2026-10-27.

EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗

Severity and scoring

CVSS score
8.8 · HIGH
CVSS version
3.1
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-787

CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.

Known exploitation and remediation

Listed in CISA’s Known Exploited Vulnerabilities catalog.

Affected product
Apple · Multiple Products
Added to catalog
2023-12-04
Required action
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
CISA remediation due date
2023-12-25

CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.

Verify affected versions and patch availability in the vendor advisory before making changes.

Affected products and versions

  • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*

    Before (exclusive): 17.1.2

  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*

    Before (exclusive): 15.8.1

  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*

    From (inclusive): 16.0

    Before (exclusive): 16.7.3

  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*

    From (inclusive): 17.0

    Before (exclusive): 17.1.2

  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

    Before (exclusive): 15.8.1

  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

    From (inclusive): 16.0

    Before (exclusive): 16.7.3

  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

    From (inclusive): 17.0

    Before (exclusive): 17.1.2

  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

    From (inclusive): 14.0

    Before (exclusive): 14.1.2

  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

  • cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

  • cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

  • cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

  • cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*

    Before (exclusive): 2.42.3

These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.

Advisories and references

Explore official sources

Read the official NVD record ↗

Explore the CISA catalog ↗

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