CWE-821 (Incorrect Synchronization) documents a weakness type used across vulnerability databases and security assessments. Use the sections below for definition, context, and mapped CVEs.
The product utilizes a shared resource in a concurrent manner, but it does not correctly synchronize access to the resource.
| Kind | Name | Class | Prevalence | OS / CPE |
|---|---|---|---|---|
| language | — | Not Language-Specific | Undetermined | — |
These CVEs are mapped to this weakness in this database and kept for traceability and search.
| CVE | Published | Summary |
|---|---|---|
| CVE-2026-21919 | 2026-04-09 | An Incorrect Synchronization vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker with low privileges to cause a complete Deni… |
| CVE-2024-58133 | 2025-04-06 | In chainmaker-go (aka ChainMaker) before 2.4.0, when making frequent updates to a node's configuration file and restarting this node, concurrent writes by logger.go to a map are mishandled. Creating o… |
| CVE-2024-58132 | 2025-04-06 | In chainmaker-go (aka ChainMaker) before 2.3.6, multiple updates to a single node's configuration can cause other normal nodes to perform concurrent read and write operations on a map, leading to a pa… |
| CVE-2024-58131 | 2025-04-06 | FISCO BCOS 3.11.0 has an issue with synchronization of the transaction pool that can, for example, be observed when a malicious node (that has modified the codebase to allow a large min_seal_time valu… |
| CVE-2024-6657 | 2024-10-11 | A denial of service may be caused to a single peripheral device in a BLE network when multiple central devices continuously connect and disconnect to the peripheral. A hard reset is required to recov… |
| CVE-2024-4278 | 2024-09-26 | An information disclosure issue has been discovered in GitLab EE affecting all versions starting from 16.5 prior to 17.2.8, from 17.3 prior to 17.3.4, and from 17.4 prior to 17.4.1. A maintainer could… |
| CVE-2024-5755 | 2024-06-27 | In lunary-ai/lunary versions <=v1.2.11, an attacker can bypass email validation by using a dot character ('.') in the email address. This allows the creation of multiple accounts with essentially the … |
| CVE-2024-1739 | 2024-04-16 | lunary-ai/lunary is vulnerable to an authentication issue due to improper validation of email addresses during the signup process. Specifically, the server fails to treat email addresses as case insen… |
| CVE-2024-1902 | 2024-04-10 | lunary-ai/lunary is vulnerable to a session reuse attack, allowing a removed user to change the organization name without proper authorization. The vulnerability stems from the lack of validation to c… |
| CVE-2023-5088 | 2023-11-03 | A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead (potentially overwriting the VM's boot code). This could be used, for… |
| CVE-2022-1931 | 2022-05-31 | Incorrect Synchronization in GitHub repository polonel/trudesk prior to 1.2.3. |
| Date | Name | Version | Importance | Comment |
|---|---|---|---|---|
| 2010-12-13 | CWE Content Team | 1.11 | — | updated Relationships |
| 2011-06-01 | CWE Content Team | 1.13 | — | updated Common_Consequences, Relationships, Taxonomy_Mappings |
| 2012-05-11 | CWE Content Team | 2.2 | — | updated Relationships, Taxonomy_Mappings |
| 2019-01-03 | CWE Content Team | 3.2 | — | updated Relationships |
| 2019-09-23 | CWE Content Team | 3.4.1 | — | updated Maintenance_Notes |
| 2020-02-24 | CWE Content Team | 4.0 | — | updated Relationships |
| 2020-06-25 | CWE Content Team | 4.1 | — | updated Relationships |
| 2020-08-20 | CWE Content Team | 4.2 | — | updated Relationships |
| 2020-12-10 | CWE Content Team | 4.3 | — | updated Relationships |
| 2023-01-31 | CWE Content Team | 4.10 | — | updated Description |
| 2023-04-27 | CWE Content Team | 4.11 | — | updated Relationships |
| 2023-06-29 | CWE Content Team | 4.12 | — | updated Mapping_Notes |
| 2025-12-11 | CWE Content Team | 4.19 | — | updated Applicable_Platforms, Detection_Factors, Time_of_Introduction, Weakness_Ordinalities |