A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, Safari 15, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, Safari 15, tvOS 15, iOS 15 and iPadOS 15, watchOS 8. Processing maliciously crafted web content may lead to arbitrary code execution.

When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server.

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, iOS 15.2 and iPadOS 15.2, macOS Big Sur 11.6.2. Processing a maliciously crafted font may result in the disclosure of process memory.

Multiple issues were addressed by removing HDF5. This issue is fixed in iOS 15.2 and iPadOS 15.2, macOS Monterey 12.1. Multiple issues in HDF5.

A type confusion issue was addressed with improved memory handling. This issue is fixed in Safari 15.1, tvOS 15.1, iOS 15 and iPadOS 15, macOS Monterey 12.0.1, watchOS 8.1. Processing maliciously crafted web content may lead to code execution.

Description: A permissions issue was addressed with improved validation. This issue is fixed in iOS 15.1 and iPadOS 15.1, tvOS 15.1, macOS Big Sur 11.6.2, watchOS 8.1, macOS Monterey 12.1. A malicious application may be able to bypass Privacy preferences.

Description: A logic issue was addressed with improved state management. This issue is fixed in iOS 15 and iPadOS 15, macOS Monterey 12.0.1. Turning off "Block all remote content" may not apply to all remote content types.

A race condition was addressed with improved locking. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.5. An application may be able to gain elevated privileges.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with system privileges.

A permissions issue was addressed with improved validation. This issue is fixed in iOS 15.2 and iPadOS 15.2, watchOS 8.3, macOS Monterey 12.1, tvOS 15.2. A malicious application may be able to read sensitive contact information.

A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.1, iOS 15.2 and iPadOS 15.2. A malicious application may be able to execute arbitrary code with kernel privileges.

A race condition was addressed with improved state handling. 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. A malicious application may be able to elevate privileges.

An access issue was addressed with improved access restrictions. This issue is fixed in macOS Monterey 12.0.1. A malicious application may be able to access local users' Apple IDs.

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.1, watchOS 8.3, iOS 15.2 and iPadOS 15.2, tvOS 15.2. An attacker in a privileged network position may be able to execute arbitrary code.

A logic issue was addressed with improved validation. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may bypass Gatekeeper checks.

An access issue was addressed with improved access restrictions. This issue is fixed in macOS Monterey 12.1. A device may be passively tracked via BSSIDs.

A device configuration issue was addressed with an updated configuration. This issue is fixed in macOS Monterey 12.1. A device may be passively tracked by its Bluetooth MAC address.