VYPR
← All advisories
Unrated severityNVD Advisory· Published May 21, 2024· Updated May 4, 2025

enetc: Fix illegal access when reading affinity_hint

CVE-2021-47368

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

168

Patches

Vulnerability mechanics

References

4

News mentions

0

No linked articles in our index yet.