Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

CVEs (2,509)

CVE VENDORS PRODUCTS UPDATED PUBLISHED CVSS
CVE-2021-31004 1Apple 1Macos Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 5.1 MEDIUM· v2 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.
CVE-2021-30996 1Apple 3Ipados Iphone OsMacos Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 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.
CVE-2021-30995 1Apple 6Ipados Iphone OsMac Os X+3 more Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 5.1 MEDIUM· v2 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 malici...Show more 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.Show less
CVE-2021-30984 3Apple DebianFedoraproject 8Debian Linux FedoraIpados+5 more Jun 17, 2026 Aug 24, 2021 N/A· v4 7.5 HIGH· v3 5.1 MEDIUM· v2 A race condition was addressed with improved state handling. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead...Show more A race condition was addressed with improved state handling. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.Show less
CVE-2021-30982 1Apple 2Mac Os X Macos Jun 17, 2026 Aug 24, 2021 N/A· v4 5.9 MEDIUM· v3 4.3 MEDIUM· v2 A race condition was addressed with improved locking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A remote attacker may be able to cause unexpected application ter...Show more A race condition was addressed with improved locking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A remote attacker may be able to cause unexpected application termination or heap corruption.Show less
CVE-2021-30955 1Apple 5Ipados Iphone OsMacos+2 more Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.1, watchOS 8.3, iOS 15.2 and iPadOS 15.2, tvOS 15.2. A malicious application may be able to execute arbitrary code wit...Show more A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.1, watchOS 8.3, iOS 15.2 and iPadOS 15.2, tvOS 15.2. A malicious application may be able to execute arbitrary code with kernel privileges.Show less
CVE-2021-30933 1Apple 1Macos Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.
CVE-2021-30923 1Apple 3Ipados Iphone OsMacos Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 A race condition was addressed with improved locking. This issue is fixed in macOS Monterey 12.0.1. A malicious application may be able to execute arbitrary code with kernel privileges.
CVE-2021-30899 1Apple 2Mac Os X Macos Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary...Show more A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.Show less
CVE-2021-30868 1Apple 1Macos Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 A race condition was addressed with improved locking. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.
CVE-2021-30857 1Apple 6Ipados Iphone OsMac Os X+3 more Jun 17, 2026 Aug 24, 2021 N/A· v4 7.0 HIGH· v3 7.6 HIGH· v2 A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious applicat...Show more A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.Show less
CVE-2021-29986 1Mozilla 3Firefox Firefox EsrThunderbird Jun 17, 2026 Aug 17, 2021 N/A· v4 8.1 HIGH· v3 6.8 MEDIUM· v2 A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. Note: This issue only affected Linux operating systems. Other operating systems are unaffected. This vul...Show more A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. Note: This issue only affected Linux operating systems. Other operating systems are unaffected. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.Show less
CVE-2021-3573 3Fedoraproject LinuxRedhat 3Enterprise Linux FedoraLinux Kernel Jun 17, 2026 Aug 13, 2021 N/A· v4 6.4 MEDIUM· v3 6.9 MEDIUM· v2 A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together wit...Show more A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.Show less
CVE-2021-38587 1Cpanel 1Cpanel Jun 17, 2026 Aug 11, 2021 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 In cPanel before 96.0.13, scripts/fix-cpanel-perl mishandles the creation of temporary files (SEC-586).
CVE-2021-38191 1Tokio 1Tokio Jun 17, 2026 Aug 8, 2021 N/A· v4 5.9 MEDIUM· v3 4.3 MEDIUM· v2 An issue was discovered in the tokio crate before 1.8.1 for Rust. Upon a JoinHandle::abort, a Task may be dropped in the wrong thread.
CVE-2021-36221 5Debian FedoraprojectGolang+2 more 5Debian Linux FedoraGo+2 more Jun 17, 2026 Aug 8, 2021 N/A· v4 5.9 MEDIUM· v3 4.3 MEDIUM· v2 Go before 1.15.15 and 1.16.x before 1.16.7 has a race condition that can lead to a net/http/httputil ReverseProxy panic upon an ErrAbortHandler abort.
CVE-2020-36458 1Lexer Project 1Lexer Jun 17, 2026 Aug 8, 2021 N/A· v4 8.1 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in the lexer crate through 2020-11-10 for Rust. For ReaderResult<T, E>, there is an implementation of Sync with a trait bound of T: Send, E: Send.
CVE-2020-36454 1Parc Project 1Parc Jun 17, 2026 Aug 8, 2021 N/A· v4 8.1 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in the parc crate through 2020-11-14 for Rust. LockWeak<T> has an unconditional implementation of Send without trait bounds on T.
CVE-2020-36447 1V9 Project 1V9 Jun 17, 2026 Aug 8, 2021 N/A· v4 8.1 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in the v9 crate through 2020-12-18 for Rust. There is an unconditional implementation of Sync for SyncRef<T>.
CVE-2020-36446 1Signal Simple Project 1Signal Simple Jun 17, 2026 Aug 8, 2021 N/A· v4 8.1 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in the signal-simple crate through 2020-11-15 for Rust. There are unconditional implementations of Send and Sync for SyncChannel<T>.

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