In the Linux kernel, the following vulnerability has been resolved: enetc: Fix illegal access when reading affinity_hint irq_set_affinity_hit() stores a reference to the cpumask_t parameter in the irq descriptor, and that reference can be accessed later from irq_affinity_hint_proc_show(). Since the cpu_mask parameter passed to irq_set_affinity_hit() has only temporary storage (it's on the stack memory), later accesses to it are illegal. Thus reads from the corresponding procfs affinity_hint file can result in paging request oops. The issue is fixed by the get_cpu_mask() helper, which provides a permanent storage for the cpumask_t parameter.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-21T15:03:34.494Z

Updated: 2024-12-19T07:40:35.522Z

Reserved: 2024-05-21T14:58:30.810Z

Link: CVE-2021-47368

cve-icon Vulnrichment

Updated: 2024-08-04T05:32:08.655Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-05-21T15:15:22.773

Modified: 2024-11-21T06:35:59.743

Link: CVE-2021-47368

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2021-47368 - Bugzilla