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TI-2021-19354 Aliases CVE-2021-43412GHSA-x9rv-39rr-f53c

An issue was discovered in GNU Hurd before 0.9 20210404-9.

Priority LOW 34CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

An issue was discovered in GNU Hurd before 0.9 20210404-9. libports accepts fake notification messages from any client on any port, which can lead to port use-after-free. This can be exploited for local privilege escalation to get full root access.

Why it matters now

EPSS 0.0036 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:*before 0.9.20210404-9VulnerableGNU
  • cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:* Versions before 0.9.20210404-9 Vulnerable ·GNU

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43412
  2. 2026-10-03 Alias added: GHSA-x9rv-39rr-f53c

References

Exploit 1

Other 1

  • TI-2021-19355 An issue was discovered in GNU Hurd before 0.9 20210404-9. CVSS 3.1HIGH 8.8
  • TI-2021-19353 An issue was discovered in GNU Hurd before 0.9 20210404-9. CVSS 3.1HIGH 7.5
  • TI-2021-19356 An issue was discovered in GNU Hurd before 0.9 20210404-9. CVSS 3.1HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences