CVE-2026-72086

kernel: scsi: xen: scsiback: Free the command tag on the TMR submit-failure path

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 15, 2026

Updated · August 18, 2026

Description

A flaw was found in the Linux kernel's scsi: xen: scsiback component. A pvSCSI guest can trigger a resource leak by issuing specific SCSI (Small Computer System Interface) requests when a task management operation fails. This vulnerability allows the guest to leak command tags associated with a Logical Unit Number (LUN) session, which can lead to a Denial of Service (DoS) by stopping the LUN.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime