Use‑After‑Free WebKit Vulnerability (CVE‑2025‑43529) Impacts Apple iOS, iPadOS, macOS and All WebKit‑Based Browsers
What It Is – Apple’s WebKit engine in iOS, iPadOS, macOS and any product that embeds WebKit contains a use‑after‑free memory‑corruption bug (CVE‑2025‑43529). Crafted web content can trigger the flaw, potentially leading to arbitrary code execution.
Exploitability – The vulnerability is publicly disclosed; proof‑of‑concept code exists and the CVSS base score is 8.8 (High). No known active widespread exploit, but the attack surface is large because WebKit is widely deployed.
Affected Products – Apple iOS, iPadOS, macOS, Safari, and any third‑party browsers or HTML parsers that rely on WebKit (e.g., Electron‑based apps).
Why It Matters for Trust & Control Assurance
- Patch Management Discipline – Demonstrating a documented, repeatable process for applying vendor security updates is a core control that maps to multiple frameworks (e.g., NIST CSF “Protect” and ISO 27001 “Asset Management”).
- Evidence of Timely Remediation – Continuous monitoring of patch status provides defensible audit evidence that the organization mitigates known software flaws promptly.
- Supply‑Chain Visibility – Because non‑Apple products embed WebKit, organizations must track third‑party component versions, a control area that underpins vendor‑risk assurance.
Recommended Actions
- Verify current WebKit version on all Apple devices and any embedded WebKit components.
- Apply Apple’s security update that addresses CVE‑2025‑43529 as soon as it is released.
- Update third‑party browsers or applications that bundle WebKit to the patched version.
- Enable automated patch‑management tooling and capture remediation timestamps as audit evidence.
- Review web‑content filtering rules to block suspicious HTML/JavaScript that could exploit the flaw.
Source: CISA KEV – CVE‑2025‑43529