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HIGH CISA KEV

CVE-2025-43529

CVSS v3

8.8

HIGH

EPSS Score

8.8 %

exploit probability, as of 2026-10-19

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • webkit2gtk3AlmaLinux:9all versions · fixed in 2.50.4-1.el9_7and 3 other packages
  • webkit2gtk3AlmaLinux:8all versions · fixed in 2.50.4-1.el8_10and 3 other packages

Vendor advisories

  • CVE-2025-43529 Red Hat Product Security482 products fixed · 10 known affected

    webkitgtk: webkitgtk: Use-after-free due to improper memory management

    pywebkitgtk.src as a component of Red Hat Enterprise Linux 6 · webkitgtk as a component of Red Hat Enterprise Linux 6 · webkitgtk-devel as a component of Red Hat Enterprise Linux 6

  • RHSA-2025:23975 Red Hat Product Security18 products fixed

    Red Hat Security Advisory: webkitgtk4 security update

  • RHSA-2025:23974 Red Hat Product Security46 products fixed

    Red Hat Security Advisory: webkit2gtk3 security update

  • RHSA-2025:23972 Red Hat Product Security46 products fixed

    Red Hat Security Advisory: webkit2gtk3 security update

  • RHSA-2025:23973 Red Hat Product Security47 products fixed

    Red Hat Security Advisory: webkit2gtk3 security update

  • RHSA-2025:23971 Red Hat Product Security46 products fixed

    Red Hat Security Advisory: webkit2gtk3 security update

6 more advisories

Full record on NVD

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.2, Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, visionOS 26.2, tvOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.

CISA Known Exploited Vulnerability

Date Added
2025-12-15
Patch Due Date
2026-01-05
Ransomware Use
Unknown

Technical details

Published
2025-12-17

Frequently asked questions

What is CVE-2025-43529?

A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.2, Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, visionOS 26.2, tvOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.

Is CVE-2025-43529 actively exploited?

Yes. CVE-2025-43529 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-01-05.

What is the CVSS score for CVE-2025-43529?

CVE-2025-43529 has a CVSS v3 base score of 8.8 (HIGH severity).

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