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TI-2021-19353 Aliases CVE-2021-43411GHSA-gm4g-p4jj-grph

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

Priority LOW 35CWE-362Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.

Why it matters now

EPSS 0.01266 69th 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-2021-43411
  2. 2026-10-03 Alias added: GHSA-gm4g-p4jj-grph

References

Exploit 1

Patch 1

Other 1

  • TI-2021-19355 An issue was discovered in GNU Hurd before 0.9 20210404-9. CVSS 3.1HIGH 8.8
  • TI-2021-19354 An issue was discovered in GNU Hurd before 0.9 20210404-9. CVSS 3.1HIGH 7.8
  • 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