Medium [CVE-2026-43727] Maliciously crafted web content may cause unexpected process crash
This medium-severity Red Hat Linux advisory covers CVE-2026-43727 affecting Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.
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Summary
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2.
Processing maliciously crafted web content may lead to an unexpected Safari crash. A flaw was found in WebKitGTK.
Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-416.
Affected Red Hat products: Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
- 26.5.2
- webkitgtk4-0:2.52.5-1.el7_9
- webkit2gtk3-0:2.52.5-1.el8_10
- webkit2gtk3-0:2.52.5-1.el8_4
- webkit2gtk3-0:2.52.5-1.el8_6
- webkit2gtk3-0:2.52.5-1.el8_8
- webkit2gtk3-0:2.52.5-1.el9_8
- webkit2gtk3-0:2.52.5-1.el9_2
- webkit2gtk3-0:2.52.5-1.el9_4
- webkit2gtk3-0:2.52.5-1.el9_6
- RHSA-2026:58564
- RHSA-2026:42088
- RHSA-2026:57348
- RHSA-2026:59325
- RHSA-2026:59326
- RHSA-2026:42062
- RHSA-2026:58550
- RHSA-2026:54634
- RHSA-2026:54572
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Mitigation
Upgrade to a fixed release: 26.5.2, webkitgtk4-0:2.52.5-1.el7_9, webkit2gtk3-0:2.52.5-1.el8_10, webkit2gtk3-0:2.52.5-1.el8_4, webkit2gtk3-0:2.52.5-1.el8_6, webkit2gtk3-0:2.52.5-1.el8_8. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
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