CWE-663 (Use of a Non-reentrant Function in a Concurrent Context) documents a weakness type used across vulnerability databases and security assessments. Use the sections below for definition, context, and mapped CVEs.
The product calls a non-reentrant function in a concurrent context in which a competing code sequence (e.g. thread or signal handler) may have an opportunity to call the same function or otherwise influence its state.
| Kind | Name | Class | Prevalence | OS / CPE |
|---|---|---|---|---|
| language | — | Not Language-Specific | Undetermined | — |
| language | C | — | Undetermined | — |
These CVEs are mapped to this weakness in this database and kept for traceability and search.
| CVE | Published | Summary |
|---|---|---|
| CVE-2026-26201 | 2026-02-19 | emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 3.21.2, multiple shared maps are accessed without consistent synchronization across goroutines. Under concurrent activi… |
| Date | Name | Version | Importance | Comment |
|---|---|---|---|---|
| 2008-07-01 | Eric Dalci | 1.0 | — | updated References, Potential_Mitigations, Time_of_Introduction |
| 2008-09-08 | CWE Content Team | 1.0 | — | updated Relationships, References |
| 2009-03-10 | CWE Content Team | 1.3 | — | updated Related_Attack_Patterns |
| 2010-09-27 | CWE Content Team | 1.10 | — | updated Name, Observed_Examples, Potential_Mitigations, References, Relationships |
| 2010-12-13 | CWE Content Team | 1.11 | — | updated Description, Name, Relationships |
| 2011-06-01 | CWE Content Team | 1.13 | — | updated Common_Consequences |
| 2012-05-11 | CWE Content Team | 2.2 | — | updated Relationships |
| 2014-07-30 | CWE Content Team | 2.8 | — | updated Relationships |
| 2017-11-08 | CWE Content Team | 3.0 | — | updated Observed_Examples |
| 2020-02-24 | CWE Content Team | 4.0 | — | updated Relationships |
| 2020-06-25 | CWE Content Team | 4.1 | — | updated Relationships |
| 2020-12-10 | CWE Content Team | 4.3 | — | updated Common_Consequences |
| 2023-01-31 | CWE Content Team | 4.10 | — | updated Description |
| 2023-04-27 | CWE Content Team | 4.11 | — | updated References, Relationships, Time_of_Introduction |
| 2023-06-29 | CWE Content Team | 4.12 | — | updated Mapping_Notes |
| 2023-10-26 | CWE Content Team | 4.13 | — | updated Demonstrative_Examples |
| 2025-04-03 | CWE Content Team | 4.17 | — | updated Demonstrative_Examples |
| 2025-12-11 | CWE Content Team | 4.19 | — | updated Applicable_Platforms, Detection_Factors, Weakness_Ordinalities |