CVE-2026-26201CWE-362CWE-663

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

High · published February 19, 2026

CVSS v4.0
7.0
EPSS
0%
Percentile
21.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.0 · HIGH
Vector
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
EPSS
0.00291 · 21.3th percentile
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
Published
2026-02-19T19:21Z
EPSS history
Timeline
  • 19 FEB 19:21Z
    emp3r0r Affected by Concurrent Map Access DoS (panic/crash)
    cvelistv5