CVE-2024-26977

kernel: pci_iounmap(): Fix MMIO mapping leak

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 1, 2024

Updated · November 21, 2025

Description

A vulnerability was found in the pci_iounmap() function in the Linux Kernel, where a lack of proper checks can result in memory leakage. This occurs due to the #ifdef ARCH_HAS_GENERIC_IOPORT_MAP macro which also guards the iounmap() function, causing MMIO mappings to leak. This issue can lead to resource exhaustion over time.

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 not specified