High severityNVD Advisory· Published Feb 19, 2026· Updated Feb 19, 2026
emp3r0r Affected by Concurrent Map Access DoS (panic/crash)
CVE-2026-26201
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/jm33-m0/emp3r0r/coreGo | < 0.0.0-20260212232424-ea4d074f081d | 0.0.0-20260212232424-ea4d074f081d |
Affected products
3- ghsa-coords2 versionspkg:golang/github.com/jm33-m0/emp3r0r/corepkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6
< 0.0.0-20260212232424-ea4d074f081d+ 1 more
- (no CPE)range: < 0.0.0-20260212232424-ea4d074f081d
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- jm33-m0/emp3r0rv5Range: < 3.21.2
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-f5p9-j34q-pwccghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-26201ghsaADVISORY
- github.com/jm33-m0/emp3r0r/commit/ea4d074f081dac6293f3aec38f01def5f08d5af5ghsax_refsource_MISCWEB
- github.com/jm33-m0/emp3r0r/releases/tag/v3.21.2ghsax_refsource_MISCWEB
- github.com/jm33-m0/emp3r0r/security/advisories/GHSA-f5p9-j34q-pwccghsax_refsource_CONFIRMWEB
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