CVE-2026-82636 | BDVDB-2026-366364 Detail

Qubes OSQubes OS

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: adjacent.

Weaknesses#

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

References#

Exploit#

No public exploit known

History#

Version 12026-08-30Record published in the CVE List.
Version 22026-08-31Most recent update recorded in the CVE List.

Published

Published: 2026-08-30
Last modified: 2026-08-31

Vendor information

Vendor: Qubes OS
Product: Qubes OS

All Qubes OS vulnerabilities

Score

7.9 High

EPSS

1.9%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 80.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Command Injection

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< qubes-core-dom0-linux 4.3.22
Fixed
qubes-core-dom0-linux 4.3.22

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.9 High

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Metric breakdown
Attack Vector	Adjacent
Attack Complexity	High
Privileges Required	None
User Interaction	Required
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).