# CVE-2021-47368: linux: In the Linux kernel, the following vulnerability has been resolved:  enetc: Fix illegal access when reading affinity_...

CVE-2021-47368 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47368, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47368
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.9-1 | [DEBIAN-CVE-2021-47368](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47368.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.9-1 | [DEBIAN-CVE-2021-47368](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47368.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.9-1 | [DEBIAN-CVE-2021-47368](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47368.md) | May 21, 2024 |

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