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Fencer Vulns
high 8.8

CVE-2023-43000 kev in the critical feed json

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

published 2025-11-05 12 mo ago modified 2026-10-28 11 d ago also EUVD-2023-47421

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2026-03-05
epss
4.0%
EPSS 4.0% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.

Patch / fix

cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  • Apple macOS 13.5
  • Apple iOS and iPadOS 15.8.7, 16.6
  • Apple Safari 16.6
  • wpewebkit Debian 14, Debian 13 2.42.0-1
  • webkit2gtk Debian 12 2.42.1-1~deb12u1
  • webkit2gtk Debian 14, Debian 13 2.42.0-1

debian advisories DEBIAN-CVE-2023-43000

  • webkit2gtk Ubuntu 22.04 LTS 2.42.1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-43000

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 8 2.42.5-1.el8
  • webkit2gtk3-jsc RHEL 8 2.42.5-1.el8
  • webkit2gtk3 RHEL 9 2.42.5-1.el9
  • webkit2gtk3-jsc RHEL 9 2.42.5-1.el9
  • webkitgtk4 RHEL 7 ELS 2.48.3-2.el7_9
  • webkitgtk4-jsc RHEL 7 ELS 2.48.3-2.el7_9
  • webkit2gtk3 RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 2.46.3-1.el8_4
  • webkit2gtk3-jsc RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 2.46.3-1.el8_4

red hat advisories RHSA-2025:10364RHSA-2024:9679RHSA-2024:9646RHSA-2024:9680RHSA-2024:9653RHSA-2024:8496

  • webkit2gtk3 SLES for SAP applications 16.0, SLES 16.0 2.50.4-160000.1.1
  • webkit2gtk4 SLES for SAP applications 16.0, SLES 16.0 2.50.4-160000.1.1
  • webkit2gtk3 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 +2 more 2.50.4-150600.12.54.1
  • webkit2gtk4 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +4 more 2.50.4-150600.12.54.1
  • webkit2gtk3-soup2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +2 more 2.50.4-150600.12.54.1
  • webkit2gtk3 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.50.3-150400.4.130.4
  • webkit2gtk4 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.50.3-150400.4.130.4
  • webkit2gtk3-soup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 2.50.3-150400.4.130.4

suse advisories SUSE-SU-2026:20102-1SUSE-SU-2026:0021-1SUSE-SU-2025:4423-1SUSE-SU-2025:4416-1

  • webkit2gtk3 openSUSE Leap 16.0 2.50.4-160000.1.1
  • webkit2gtk4 openSUSE Leap 16.0 2.50.4-160000.1.1
  • webkit2gtk3-soup2 openSUSE Leap 16.0 2.50.4-160000.1.1

opensuse advisories openSUSE-SU-2026:20065-1

  • webkit2gtk3 AlmaLinux 8 2.50.3-1.el8_10
  • webkit2gtk3-jsc AlmaLinux 8 2.50.3-1.el8_10
  • webkit2gtk3 AlmaLinux 9 2.50.3-1.el9_7
  • webkit2gtk3-jsc AlmaLinux 9 2.50.3-1.el9_7
  • webkit2gtk3 AlmaLinux 8 2.42.5-1.el8
  • webkit2gtk3-jsc AlmaLinux 8 2.42.5-1.el8

almalinux advisories ALSA-2025:22789ALSA-2025:22790ALSA-2024:2982

  • webkit2gtk3 Rocky Linux 9 2.50.3-1.el9_7
  • webkit2gtk3 Rocky Linux 8 2.50.3-1.el8_10

rocky linux advisories RLSA-2025:22790RLSA-2025:22789

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-2023-43000 updated cvss 8.8

webkitgtk: Processing maliciously crafted web content may lead to memory corruption

  • Red Hat Enterprise Linux 6 webkitgtk
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.42.5-1.el8, webkit2gtk3-jsc 2.42.5-1.el8
    fixed: vendor fix RHSA-2024:2982
  • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.42.5-1.el9, webkit2gtk3-jsc 2.42.5-1.el9
    fixed: vendor fix RHSA-2024:2126
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) webkit2gtk3 2.46.3-1.el8_2, webkit2gtk3-jsc 2.46.3-1.el8_2
    fixed: vendor fix RHSA-2024:9680
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3 2.46.3-1.el8_4, webkit2gtk3-jsc 2.46.3-1.el8_4
    fixed: vendor fix RHSA-2024:9679
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3 2.46.3-1.el8_6, webkit2gtk3-jsc 2.46.3-1.el8_6
    fixed: vendor fix RHSA-2024:9653
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) webkit2gtk3 2.46.3-1.el8_4, webkit2gtk3-jsc 2.46.3-1.el8_4
    fixed: vendor fix RHSA-2024:9679
show 7 more
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) webkit2gtk3 2.46.3-1.el8_6, webkit2gtk3-jsc 2.46.3-1.el8_6
    fixed: vendor fix RHSA-2024:9653
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) webkit2gtk3 2.46.1-1.el9_0, webkit2gtk3-jsc 2.46.1-1.el9_0
    fixed: vendor fix RHSA-2024:8496
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) webkit2gtk3 2.46.3-1.el8_8, webkit2gtk3-jsc 2.46.3-1.el8_8
    fixed: vendor fix RHSA-2024:9646
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) webkit2gtk3 2.46.1-1.el9_2, webkit2gtk3-jsc 2.46.1-1.el9_2
    fixed: vendor fix RHSA-2024:8492
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) webkit2gtk3 2.46.3-1.el8_4, webkit2gtk3-jsc 2.46.3-1.el8_4
    fixed: vendor fix RHSA-2024:9679
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) webkit2gtk3 2.46.3-1.el8_6, webkit2gtk3-jsc 2.46.3-1.el8_6
    fixed: vendor fix RHSA-2024:9653
  • 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. Published
  2. Added to CISA KEV
  3. CISA SSVC: exploitation active
  4. CISA patch deadline

Known exploited

Added
8 mo ago
Patch by
2026-03-26 (7 mo ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor, product
Apple, Multiple Products
CISA name
Apple Multiple products Use-After-Free Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
8 mo ago

Exploit prediction

4.04% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • cloud.google.com https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Apple macOS
  • Apple iOS and iPadOS
  • Apple Safari

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.