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CWE-663:Use of a Non-reentrant Function in a Concurrent Context
Weakness ID:663
Version:v4.17
Weakness Name:Use of a Non-reentrant Function in a Concurrent Context
Vulnerability Mapping:Allowed
Abstraction:Base
Structure:Simple
Status:Draft
Likelihood of Exploit:
DetailsContent HistoryObserved CVE ExamplesReports
1Vulnerabilities found
CVE-2026-26201
Assigner-GitHub, Inc.
ShareView Details
Assigner-GitHub, Inc.
CVSS Score-7||HIGH
EPSS-Not Assigned
Published-19 Feb, 2026 | 19:21
Updated-19 Feb, 2026 | 21:22
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
emp3r0r Affected by Concurrent Map Access DoS (panic/crash)

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.

Action-Not Available
Vendor-jm33-m0
Product-emp3r0r
CWE ID-CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE ID-CWE-663
Use of a Non-reentrant Function in a Concurrent Context