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TI-2026-56974 Aliases CVE-2026-82636GHSA-ppf9-cgjm-478m

OS command injection in Qubes OS

Priority MEDIUM 40CWE-78Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

Qubes OS before qubes-core-dom0-linux 4.3.22 allows OS command injection during a qvm-copy-to-vm call from dom0 to an attacker-controlled qube, because the "system" library function is used to process an error message that may have shell metacharacters. This occurs in core-admin-linux/file-copy-vm/qfile-dom0-agent.c.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01922 80th percentileScored 2026-11-07
Fix Fixed Qubes OS (Qubes OS): qubes-core-dom0-linux 4.3.22

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Qubes OSQubes OSbefore qubes-core-dom0-linux 4.3.22qubes-core-dom0-linux 4.3.22Patch availableCNA
  • Qubes OS VendorQubes OS Affected before qubes-core-dom0-linux 4.3.22 Fixed in qubes-core-dom0-linux 4.3.22 Patch available CNA

Remediation

  • Fix · CNA Qubes OS (Qubes OS) Fixed in qubes-core-dom0-linux 4.3.22

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82636
  2. 2026-10-03 Alias added: GHSA-ppf9-cgjm-478m

References

Other 2

Sources

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