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Apple and Red Hat disclosed CVE-2026-43727, a use-after-free vulnerability in WebKit and WebKitGTK that can be triggered by maliciously crafted web content and cause an unexpected browser or process crash. The flaw is attributed to improper memory management and is tracked as CWE-416; Red Hat scored it CVSS 6.5 and classified it as moderate severity, with impact focused on availability rather than confirmed code execution.
Apple said the issue was fixed in Safari 26.5.2, iOS 18.7.10 and 26.5.2, iPadOS 18.7.10 and 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, and watchOS 26.6. Red Hat published fixes through multiple security errata for affected Red Hat Enterprise Linux 7, 8, and 9 offerings, while noting that Red Hat Enterprise Linux 6 packages are outside support scope and should be assumed affected if WebKitGTK is present.
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9 events from the most recent confirmed update back to the earliest known activity.
Red Hat last modified its CVE-2026-43727 customer portal entry. The entry continued to document affected and fixed RHEL offerings and mapped the flaw to CWE-416.
Red Hat released fixes for CVE-2026-43727 for Red Hat Enterprise Linux 8 via RHSA-2026:42088 and for Red Hat Enterprise Linux 9 via RHSA-2026:42062. These advisories remediated the WebKitGTK use-after-free issue on the main supported RHEL 8 and 9 streams.
Red Hat tracked the issue internally as Bug 2500534 under Security Response. The bug was reported by OSIDB Bzimport and classified as a vulnerability affecting Linux with medium priority and severity.
Red Hat published its customer portal entry for CVE-2026-43727, rating the WebKitGTK flaw Moderate severity and assigning CVSS 6.5. Red Hat described the issue as a use-after-free caused by improper memory management that could lead to an unexpected process crash.
The CVE record for CVE-2026-43727 was published with Apple listed as the CNA. The record described a use-after-free issue in WebKit-related software that could let maliciously crafted web content cause an unexpected Safari crash.
Red Hat issued RHSA-2026:58564 for Red Hat Enterprise Linux 7 Extended Lifecycle Support and RHSA-2026:58550 for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. These advisories added fixes for CVE-2026-43727 to remaining listed supported channels.
Red Hat shipped RHSA-2026:57348 to fix CVE-2026-43727 for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and 8.4 Extended Update Support Long-Life Add-On. This expanded coverage of the WebKitGTK fix to additional RHEL 8 support variants.
The CVE record for CVE-2026-43727 was updated. The record includes Apple support references and lists CISA-ADP as an authorized data publisher.
Red Hat released RHSA-2026:54634 for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions and RHSA-2026:54572 for Red Hat Enterprise Linux 9.6 Extended Update Support. These advisories extended remediation of CVE-2026-43727 to additional RHEL 9 support channels.
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Apple and Red Hat disclosed **CVE-2026-43720**, a use-after-free vulnerability in WebKit and WebKitGTK that can be triggered when a user processes maliciously crafted web content. The flaw, mapped to `CWE-416`, stems from improper memory management and can cause an unexpected browser or process crash, including Safari crashes on Apple platforms. Red Hat rated the issue **moderate** with a CVSS v3.1 score of **6.5**, noting that exploitation requires user interaction and primarily affects availability. Fixes were released across Apple products including Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS, while Red Hat published remediation for affected WebKitGTK packages in multiple Red Hat Enterprise Linux 7, 8, and 9 offerings. Red Hat said RHEL 6 packages are outside support scope and should be assumed affected, and linked the issue to WebKit advisory **WSA-2026-0004** and upstream bug **313175**.
Aug 24, 2026
Apple and Red Hat disclosed **CVE-2026-43663**, a moderate-severity `CWE-416` use-after-free flaw in WebKit/WebKitGTK caused by improper memory handling when processing maliciously crafted web content. The vulnerability can be triggered over the network with low attack complexity and no privileges, but it requires user interaction; vendors say successful exploitation can cause an unexpected process crash, creating a denial-of-service condition and potentially broader memory-corruption risks in some scenarios. Apple said it fixed the issue across Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS, while Red Hat reported remediation for multiple **RHEL 7, 8, and 9** product streams through security errata and related Bugzilla tracking. Red Hat assigned the flaw a **CVSS v3 score of 6.5** and noted that some older **RHEL 6** packages containing affected components fall outside support scope; the fix was described as improved memory handling in WebKitGTK.
Aug 24, 2026
Apple and Red Hat disclosed **`CVE-2026-43740`**, a moderate-severity use-after-free vulnerability in WebKit-derived web content processing that can let maliciously crafted pages disclose process memory. The flaw stems from improper memory handling, is mapped to **`CWE-416`**, and requires user interaction but no privileges, with Red Hat assigning a **CVSS v3.1 score of 6.5** and noting a network attack vector and low attack complexity. Apple said the issue was fixed in **Safari 26.5.2**, **iOS 26.5.2**, **iPadOS 26.5.2**, **macOS Tahoe 26.5.2**, **tvOS 26.6**, **visionOS 26.6**, and **watchOS 26.6**. Red Hat said affected **WebKitGTK** packages were addressed through multiple advisories for **Red Hat Enterprise Linux 7, 8, and 9** product streams, while **RHEL 6** packages are outside support scope and should be assumed affected.
Aug 24, 2026