CVE-2026-82636
CVSS v3
7.9
HIGH
EPSS Score
1.9 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2026-08-30
- Last Modified
- 2026-08-31
Frequently asked questions
What is CVE-2026-82636?
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.
Is CVE-2026-82636 actively exploited?
Active exploitation of CVE-2026-82636 has not been confirmed. Its EPSS score was 1.9% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-82636?
CVE-2026-82636 has a CVSS v3 base score of 7.9 (HIGH severity).
Is CVE-2026-82636 affecting your environment?
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