CVE-2021-30939
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 4.0%
exploitation probability
4.0%top 10% of all CVEs
observed exploitation
nono source reports it
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing a maliciously crafted image may lead to arbitrary code execution.
References
https://support.apple.com/en-us/HT212975https://support.apple.com/en-us/HT212976https://support.apple.com/en-us/HT212978https://support.apple.com/en-us/HT212979https://support.apple.com/en-us/HT212980https://support.apple.com/en-us/HT212981https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1414https://www.zerodayinitiative.com/advisories/ZDI-22-359/