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Fencer Vulns
medium 6.5

CVE-2023-42916 kev in the critical feed json

An out-of-bounds read was addressed with improved input validation.

published 2023-11-30 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-47337

cvss
6.5
version 3.1, CNA
cisa kev
Exploited
added 2023-12-04
epss
17.8%
EPSS 17.8% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

An out-of-bounds read was addressed with improved input validation. 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 disclose sensitive information. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

Patch / fix

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

  • Apple Safari 17.1, 17.1.2
  • Apple macOS 14.1, 14.1.2
  • Apple iOS and iPadOS 17.1
  • apple iphone_os 17.1.2
  • apple ipados 17.1.2
  • wpewebkit Debian 14, Debian 13 2.42.3-1
  • webkit2gtk Debian 12 2.42.3-1~deb12u1
  • webkit2gtk Debian 14, Debian 13 2.42.3-1

debian advisories DEBIAN-CVE-2023-42916

  • webkit2gtk Ubuntu 22.04 LTS 2.42.3-0ubuntu0.22.04.1
  • webkit2gtk Ubuntu 24.04 LTS 2.42.3-1

ubuntu advisories UBUNTU-CVE-2023-42916

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • webkit2gtk3 RHEL 9 2.38.5-1.el9_2.3
  • webkit2gtk3-jsc RHEL 9 2.38.5-1.el9_2.3
  • webkit2gtk3 RHEL 8 2.38.5-1.el8_8.5
  • webkit2gtk3-jsc RHEL 8 2.38.5-1.el8_8.5
  • webkitgtk4 RHEL 7 ELS 2.48.3-2.el7_9
  • webkitgtk4-jsc RHEL 7 ELS 2.48.3-2.el7_9

red hat advisories RHSA-2025:10364RHSA-2023:4201RHSA-2023:4202

  • webkit2gtk3 SLE Module for Desktop Applications 15 SP5, SLE Module for Desktop Applications 15 SP4, openSUSE Leap 15.5 +1 more 2.42.3-150400.4.67.1
  • webkit2gtk4 SLE Module for Development Tools 15 SP5, SLE Module for Development Tools 15 SP4, openSUSE Leap 15.5 +1 more 2.42.3-150400.4.67.1
  • webkit2gtk3-soup2 SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.5 +1 more 2.42.3-150400.4.67.1
  • webkit2gtk3 SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +1 more 2.42.3-2.161.1
  • webkit2gtk3 SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +5 more 2.42.3-150200.94.1
  • webkit2gtk3 SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 2.42.3-150000.3.160.1

suse advisories SUSE-SU-2023:4829-1SUSE-SU-2023:4828-1SUSE-SU-2023:4827-1SUSE-SU-2023:4824-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-42916 updated cvss 6.8

webkitgtk: Out-of-bounds read leads to sensitive data leak

  • Red Hat Enterprise Linux 6 webkitgtk Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.38.5-1.el8_8.5, webkit2gtk3-jsc 2.38.5-1.el8_8.5
    fixed: vendor fix RHSA-2023:4202
  • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.38.5-1.el9_2.3, webkit2gtk3-jsc 2.38.5-1.el9_2.3
    fixed: vendor fix RHSA-2023:4201
  • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4 2.48.3-2.el7_9, webkitgtk4-jsc 2.48.3-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-doc 2.48.3-2.el7_9, webkitgtk4-devel 2.48.3-2.el7_9, webkitgtk4-debuginfo 2.48.3-2.el7_9, webkitgtk4-jsc-devel 2.48.3-2.el7_9
    fixed: vendor fix RHSA-2025:10364

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. 0-day patched (Project Zero)
  2. Published
  3. CISA SSVC: exploitation active
  4. Added to CISA KEV
  5. CISA patch deadline

Known exploited

Added
2 y ago
Patch by
2023-12-25 (2 y ago)
Ransomware
Not known
Required action
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Vendor, product
Apple, Multiple Products
CISA name
Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched
2023-11-30
Details
project zero tracker

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

17.82% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

  • Apple Safari
  • Apple macOS
  • Apple iOS and iPadOS
  • apple iphone_os
  • apple ipados

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.