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CVE-2023-53501

kernel: Linux kernel: Denial of Service due to race condition in IOMMU pasid unbinding

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · October 1, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel's iommu/amd/iommu_v2 component. A local attacker with low privileges could exploit a race condition during pasid unbinding when outstanding page faults exist. This vulnerability causes a reference count to incorrectly decrement to zero, leading to a memory leak and ultimately a Denial of Service (DoS).

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-911 · Improper Update of Reference Count