Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.1, < 5.4.150 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28Patch
- https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7bPatch
- https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270Patch
- https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90Patch
- https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28Patch
- https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7bPatch
- https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270Patch
- https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90Patch
FAQ
What is CVE-2021-47368?
CVE-2021-47368 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 i...
How severe is CVE-2021-47368?
CVE-2021-47368 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47368?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.