CVE-2025-43529
HighExploitedPublic exploitwebkitgtk: webkitgtk: Use-after-free due to improper memory management
Published Dec 16, 2025 · Updated Oct 7, 2026 · Also known as DEBIAN-CVE-2025-43529, UBUNTU-CVE-2025-43529
Key Facts
Patch immediately- CVE-2025-43529 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Safari (Apple), Ipados (Apple), Iphone OS (Apple) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 12, 2025. Public exploit code is available.
- EPSS estimates a 8.8% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ipados 18.7.3, Ipados 26.2, Iphone OS 18.7.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
8.8%
Higher than 95.1% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-43529 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Dec 15, 2025 | Jan 5, 2026 | Not reported |
| Industry KEV feed | Dec 12, 2025 | Jan 5, 2026 | Not reported |
| CIRCL KEV | Dec 15, 2025 | Jan 5, 2026 | Not reported |
| ENISA EUVD | Dec 15, 2025 | n/a | Not reported |
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.
Affected Products
537 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SafariApple | See advisory | 26.2 |
| IpadosApple | See advisory | 18.7.3 |
| Iphone OSApple | See advisory | 18.7.3 |
| macOSApple | See advisory | 26.2 |
| tvOSApple | See advisory | 26.2 |
Patched Releases
Ipados
18.7.3, 26.2
Iphone OS
18.7.3, 26.2
macOS
26.2
Safari
26.2
tvOS
26.2
visionOS
26.2
watchOS
26.2
gir1.2-javascriptcoregtk-4.0
2.50.4-0ubuntu0.22.04.1
gir1.2-javascriptcoregtk-4.1
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
gir1.2-javascriptcoregtk-6.0
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
gir1.2-webkit-6.0
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
gir1.2-webkit2-4.0
2.50.4-0ubuntu0.22.04.1
gir1.2-webkit2-4.1
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
iOS and iPadOS
18.7.3, 26.2
libjavascriptcoregtk-4_0-18
2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1, 2.50.4-4.51.1
libjavascriptcoregtk-4_0-18-32bit
2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0
2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libjavascriptcoregtk-4_1-0-32bit
2.50.4-150600.12.54.1
libjavascriptcoregtk-4.0-18
2.50.4-0ubuntu0.22.04.1
libjavascriptcoregtk-4.0-bin
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
libjavascriptcoregtk-4.0-dev
2.50.4-0ubuntu0.22.04.1
libjavascriptcoregtk-4.1-0
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
libjavascriptcoregtk-4.1-dev
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
libjavascriptcoregtk-6_0-1
2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libjavascriptcoregtk-6.0-1
2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
Timeline
Added to Industry KEV feed
Dec 12, 2025
Added to CISA KEV
Dec 15, 2025
Added to CIRCL KEV
Dec 15, 2025
Added to ENISA EUVD
Dec 15, 2025
Publicly disclosed
Dec 16, 2025
Last updated
Oct 7, 2026
Weakness Type
- CWE-416 Use After Free
- CWE-825 Expired Pointer Dereference
References
- advisoryRHSA-2025:23663
- advisoryRHSA-2025:23700
- advisoryRHSA-2025:23967
- advisoryRHSA-2025:23968
- advisoryRHSA-2025:23969
FAQ
Common Questions.
A use-after-free issue was addressed with improved memory management.
Affected: Safari (Apple); Ipados (Apple); Iphone OS (Apple), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 12, 2025.
Yes. It was added on Dec 15, 2025 with a federal remediation due date of Jan 5, 2026.
Public exploit code is available.
Fixed versions are available, including Ipados 18.7.3, Ipados 26.2, Iphone OS 18.7.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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