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CVE-2026-97478

kernel: virt: acrn: Fix irqfd use-after-free during eventfd shutdown

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 24, 2026

Updated · October 31, 2026

Description

A flaw was found in the Linux kernel's ACRN hypervisor driver. A race condition during interrupt file descriptor (irqfd) shutdown can lead to a use-after-free memory error when an irqfd is deassigned while event notification cleanup is concurrently processed. A local attacker could exploit this vulnerability to cause a system crash, resulting in a Denial of Service (DoS), or potentially escalate privileges.

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-825 · Expired Pointer Dereference