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Common Weakness Enumeration

CWE-663

Use of a Non-reentrant Function in a Concurrent Context

Category: BaseCVE: 1

Description

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.

CVE vulnerabilities with CWE-663 (1)

7.0

CVSS

HIGH

CVE-2026-26201

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 activity, Go runtime can trigger `fatal error: concurrent map read and map write`, causing C2 process crash (availability loss). Version 3.21.2 fixes this issue.

pub. 2026-02-19

Information

ID: CWE-663

Type: Base

Vulnerabilities: 1

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