CVE-2026-26201

emp3r0r Affected by Concurrent Map Access DoS (panic/crash)

State: Published
Severity: 7.0 High
Published: Feb 19, 2026
Updated: Feb 19, 2026
Reserved: Feb 11, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	7.0 High	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H	GitHub_M

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-663 Use of a Non-reentrant Function in a Concurrent Context

Affected Products

Product	Versions
emp3r0rjm33-m0	< 3.21.2Affected

References

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