Description
The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, visionOS 2.6, watchOS 11.6. Processing maliciously crafted web content may lead to memory corruption.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apple | Safari | < 18.6 | 18.6 |
| Apple | iOS and iPadOS | < 18.6 | 18.6 |
| Apple | macOS | < 15.6 | 15.6 |
| Apple | tvOS | < 18.6 | 18.6 |
| Apple | visionOS | < 2.6 | 2.6 |
| Apple | watchOS | < 11.6 | 11.6 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | wpewebkit +1 | 2.50.0-1 | — |
| Debian 13 | webkit2gtk | 2.50.1-1~deb13u1 | — |
| Debian 13 | wpewebkit | No fix yet | — |
| Debian 12 | webkit2gtk | 2.50.1-1~deb12u1 | — |
| Debian 12 | wpewebkit | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | webkit2gtk | 2.50.0-2ubuntu1 | — |
| Ubuntu 24.04 LTS | qtwebkit-opensource-src | No fix yet | — |
| Ubuntu 24.04 LTS | webkit2gtk | 2.50.1-0ubuntu0.24.04.1 | — |
| Ubuntu 22.04 LTS | webkit2gtk | 2.50.1-0ubuntu0.22.04.1 | — |
| Ubuntu 22.04 LTS | wpewebkit +1 | No fix yet | — |
| Ubuntu 20.04 LTS | wpewebkit +2 | No fix yet | — |
| Ubuntu 18.04 LTS | webkitgtk +3 | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | webkitgtk +3 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | webkit2gtk3 +3 | 2.50.1-0.el9_6 | RHSA-2025:18097 |
| RHEL 8 | webkit2gtk3 +3 | 2.50.0-1.el8_10 | RHSA-2025:17802 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | webkit2gtk3 +3 | 2.50.0-2.el9_4 | RHSA-2025:17741 |
| RHEL 9.2 E4S | webkit2gtk3 +3 | 2.50.0-2.el9_2 | RHSA-2025:17743 |
| RHEL 9.0 E4S | webkit2gtk3 +3 | 2.50.0-2.el9_0 | RHSA-2025:17643 |
| RHEL 8.8 TUS | webkit2gtk3 +3 | 2.50.0-1.el8_8.1 | RHSA-2025:17807 |
| RHEL 8.8 E4S | webkit2gtk3 +3 | 2.50.0-1.el8_8.1 | RHSA-2025:17807 |
| RHEL 8.6 TUS | webkit2gtk3 +3 | 2.50.0-1.el8_6 | RHSA-2025:19109 |
| RHEL 8.6 E4S | webkit2gtk3 +3 | 2.50.0-1.el8_6 | RHSA-2025:19109 |
| RHEL 8.6 AUS | webkit2gtk3 +3 | 2.50.0-1.el8_6 | RHSA-2025:19109 |
| RHEL 8.4 EUS Long Life | webkit2gtk3 +3 | 2.50.0-1.el8_4 | RHSA-2025:19165 |
| RHEL 8.4 AUS | webkit2gtk3 +3 | 2.50.0-1.el8_4 | RHSA-2025:19165 |
| RHEL 8.2 AUS | webkit2gtk3 +3 | 2.50.0-1.el8_2 | RHSA-2025:19157 |
| RHEL 7 ELS | webkitgtk4 +4 | 2.50.0-1.el7_9 | RHSA-2025:19352 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | webkit2gtk3 +3 | 2.50.0-1.el8_10 | ALSA-2025:17802 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | webkit2gtk3 +2 | 2.52.1-150600.12.63.1 | SUSE-SU-2026:1364-1 |
| SLES 15 SP6 | webkit2gtk3 +2 | 2.52.1-150600.12.63.1 | SUSE-SU-2026:1364-1 |
| SLES 15 SP5 | webkit2gtk3 +2 | 2.52.0-150400.4.137.3 | SUSE-SU-2026:1150-1 |
| SLES 15 SP4 | webkit2gtk3 +2 | 2.52.0-150400.4.137.3 | SUSE-SU-2026:1150-1 |
| SLES 12 SP5 | webkit2gtk3 | 2.52.0-4.54.1 | SUSE-SU-2026:1139-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | webkit2gtk3 +1 | 2.52.1-160000.1.1 | SUSE-SU-2026:21180-1 |
| SLES for SAP 15 SP6 | webkit2gtk3 +2 | 2.52.1-150600.12.63.1 | SUSE-SU-2026:1364-1 |
| SLES for SAP 15 SP5 | webkit2gtk3 +2 | 2.52.0-150400.4.137.3 | SUSE-SU-2026:1150-1 |
| SLES for SAP 15 SP4 | webkit2gtk3 +2 | 2.52.0-150400.4.137.3 | SUSE-SU-2026:1150-1 |
| SLES 16.0 | webkit2gtk3 +1 | 2.52.1-160000.1.1 | SUSE-SU-2026:21180-1 |
| SLE HPC 15 SP5 | webkit2gtk3 +2 | 2.52.0-150400.4.137.3 | SUSE-SU-2026:1150-1 |
| SLE HPC 15 SP4 | webkit2gtk3 +2 | 2.52.0-150400.4.137.3 | SUSE-SU-2026:1150-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | webkit2gtk3 +2 | 2.52.1-160000.1.1 | openSUSE-SU-2026:20518-1 |
| openSUSE Leap 15.6 | webkit2gtk3 +2 | 2.52.1-150600.12.63.1 | SUSE-SU-2026:1364-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | webkitgtk4 +3 | 2.50.4-1.amzn2 | ALAS2-2025-3114 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
stationedK-06/DarkSword_analysis ★ 2 · Mar 27, 2026
Static analysis of the DarkSword iOS WebKit exploit chain — delivery, staging, and CVE breakdown (CVE-2025-31277, CVE-2025-43529)
-
hoarseprairie/CVE-2025-31277-WebKit-Memory-Corruption-Patch-Bypass ★ 0 · Oct 30, 2026
Bypass of the official patch for CVE-2025-31277 (WebKit memory corruption). Allows triggering the original issue on patched Safari / iOS / macOS builds through a modified trigger path.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 22
- ALSA-2025:17802 Important: webkit2gtk3 security update AlmaLinux Security Advisories · Nov 6, 2026
- WID-SEC-2026-0782 WebKitGTK: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 28, 2026
- RHSA-2025:19165 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19352 Red Hat Security Advisory: webkitgtk4 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19157 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19109 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:18097 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:17807 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:17802 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:17743 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:17741 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:17643 Red Hat Security Advisory: webkit2gtk3 security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- WID-SEC-2025-1672 Apple macOS Sequoia, Sonoma und Ventura: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 14, 2026
- openSUSE-SU-2026:20518-1 Security update for webkit2gtk3 SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:21180-1 Security update for webkit2gtk3 SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:1364-1 Security update for webkit2gtk3 SUSE / openSUSE Security Updates · Apr 16, 2026
- WID-SEC-2025-1668 Apple iOS und iPadOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 6, 2026
- SUSE-SU-2026:1150-1 Security update for webkit2gtk3 SUSE / openSUSE Security Updates · Apr 1, 2026
- SUSE-SU-2026:1139-1 Security update for webkit2gtk3 SUSE / openSUSE Security Updates · Mar 31, 2026
- ALAS2-2025-3114 Important: webkitgtk4 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 23, 2026
- WID-SEC-2025-1683 Apple Safari: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 22, 2026
- NCSC-2025-0238 Kwetsbaarheden verholpen in Apple macOS, iOS en iPadOS NCSC-NL (Netherlands) · Jul 30, 2025