Apple Multiple Products Use-After-Free WebKit Vulnerability (CVE-2025-43529)
Severity: high · Patch status: unknown · Since 2025-12-15 · CVE-2025-43529
Apple iOS, iPadOS, macOS, and other Apple products contain a use-after-free vulnerability in WebKit. Processing maliciously crafted web content may lead to memory corruption. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing. CISA added CVE-2025-43529 to its Known Exploited Vulnerabilities catalog on Dec 15, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Jan 5, 2026 (BOD 22-01); treat that as the outer limit.
Sources
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