CVE-2021-47523

IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr

Description

In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr This buffer is currently allocated in hfi1_init(): if (reinit) ret = init_after_reset(dd); else ret = loadtime_init(dd); if (ret) goto done; /* allocate dummy tail memory for all receive contexts */ dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev, sizeof(u64), &dd->rcvhdrtail_dummy_dma, GFP_KERNEL); if (!dd->rcvhdrtail_dummy_kvaddr) { dd_dev_err(dd, "cannot allocate dummy tail memory\n"); ret = -ENOMEM; goto done; } The reinit triggered path will overwrite the old allocation and leak it. Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation to hfi1_free_devdata().

N/A

CVSS

Severity:

EPSS 0.07%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc
https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b
https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1

Frequently Asked Questions

What is the severity of CVE-2021-47523?: CVE-2021-47523 has not yet been assigned a CVSS score.
How to fix CVE-2021-47523?: To fix CVE-2021-47523, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47523 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47523 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47523?: CVE-2021-47523 affects Linux Linux, Linux Linux.

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