CVE-2023-42917
HighExploitedPublic exploitwebkitgtk: Arbitrary Remote Code Execution
Published Dec 1, 2023 · Updated Sep 8, 2026 · Also known as BIT-java-2023-42917, BIT-java-min-2023-42917, BIT-jre-2023-42917, DEBIAN-CVE-2023-42917, UBUNTU-CVE-2023-42917
Key Facts
Patch immediately- CVE-2023-42917 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Safari (Apple), Webkitgtk\+, Ipados (Apple) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 30, 2023. Public exploit code is available.
- EPSS estimates a 9.3% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ipados 15.8.1, Iphone OS 15.8.1, macOS 14.1.2.
- 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)
9.3%
Higher than 95.3% 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-2023-42917 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Dec 4, 2023 | Dec 25, 2023 | Not reported |
| Industry KEV feed | Nov 30, 2023 | Dec 25, 2023 | Not reported |
| CIRCL KEV | Dec 4, 2023 | Dec 25, 2023 | Not reported |
| ENISA EUVD | Dec 4, 2023 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
315 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SafariApple | >= unspecified | 17.1.2 |
| Webkitgtk\+Webkitgtk | See advisory | 2.42.3 |
| IpadosApple | See advisory | 15.8.1 |
| Iphone OSApple | See advisory | 15.8.1 |
| macOSApple | >= unspecified | 14.1.2 |
Patched Releases
Ipados
15.8.1
Iphone OS
15.8.1
macOS
14.1.2, 14.1
Safari
17.1.2, 17.1
iOS and iPadOS
17.1
java
1.8.0, 8.0.411
java-min
1.8.0, 8.0.411
jre
1.8.0, 8.0.411
libjavascriptcoregtk-4_0-18
2.42.3-150000.3.160.1, 2.42.3-150200.94.1, 2.42.3-150400.4.67.1, 2.42.3-2.161.1
libjavascriptcoregtk-4_0-18-32bit
2.42.3-150400.4.67.1, 2.42.3-2.161.1
libjavascriptcoregtk-4_1-0
2.42.3-150400.4.67.1
libjavascriptcoregtk-4_1-0-32bit
2.42.3-150400.4.67.1
libjavascriptcoregtk-6_0-1
2.42.3-150400.4.67.1
libwebkit2gtk-4_0-37
2.42.3-150000.3.160.1, 2.42.3-150200.94.1, 2.42.3-150400.4.67.1, 2.42.3-2.161.1
libwebkit2gtk-4_0-37-32bit
2.42.3-150400.4.67.1
libwebkit2gtk-4_1-0
2.42.3-150400.4.67.1
libwebkit2gtk-4_1-0-32bit
2.42.3-150400.4.67.1
libwebkit2gtk3-lang
2.42.3-150000.3.160.1, 2.42.3-150200.94.1, 2.42.3-2.161.1
libwebkitgtk-6_0-4
2.42.3-150400.4.67.1
openjdk-7
7.321.2.6.28-r1
openjdk-8
8.482-r8
openjdk-8-openj9
0.57.0-r5
typelib-1_0-JavaScriptCore-4_0
2.42.3-150000.3.160.1, 2.42.3-150200.94.1, 2.42.3-150400.4.67.1, 2.42.3-2.161.1
typelib-1_0-JavaScriptCore-4_1
2.42.3-150400.4.67.1
typelib-1_0-JavaScriptCore-6_0
2.42.3-150400.4.67.1
Timeline
Added to Industry KEV feed
Nov 30, 2023
Publicly disclosed
Dec 1, 2023
Added to CISA KEV
Dec 4, 2023
Added to CIRCL KEV
Dec 4, 2023
Added to ENISA EUVD
Dec 4, 2023
Last updated
Sep 8, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryRHSA-2023:7715
- advisoryRHSA-2023:7716
- advisoryRHSA-2024:2126
- advisoryRHSA-2024:2982
- advisoryRHSA-2024:8492
FAQ
Common Questions.
A memory corruption vulnerability was addressed with improved locking.
Affected: Safari (Apple) versions >= unspecified; Webkitgtk\+; Ipados (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 Nov 30, 2023.
Yes. It was added on Dec 4, 2023 with a federal remediation due date of Dec 25, 2023.
Public exploit code is available.
Fixed versions are available, including Ipados 15.8.1, Iphone OS 15.8.1, macOS 14.1.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2023-42917 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo