CVE-2021-47453

ice: Avoid crash from unnecessary IDA free

Description

In the Linux kernel, the following vulnerability has been resolved: ice: Avoid crash from unnecessary IDA free In the remove path, there is an attempt to free the aux_idx IDA whether it was allocated or not. This can potentially cause a crash when unloading the driver on systems that do not initialize support for RDMA. But, this free cannot be gated by the status bit for RDMA, since it is allocated if the driver detects support for RDMA at probe time, but the driver can enter into a state where RDMA is not supported after the IDA has been allocated at probe time and this would lead to a memory leak. Initialize aux_idx to an invalid value and check for a valid value when unloading to determine if an IDA free is necessary.

N/A

CVSS

Severity:

EPSS 0.06%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/777682e59840e24e6c5672197e6ffbcf4bff823b
https://git.kernel.org/stable/c/73e30a62b19b9fbb4e6a3465c59da186630d5f2e

Frequently Asked Questions

What is the severity of CVE-2021-47453?: CVE-2021-47453 has not yet been assigned a CVSS score.
How to fix CVE-2021-47453?: To fix CVE-2021-47453, 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-2021-47453 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47453 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-2021-47453?: CVE-2021-47453 affects Linux Linux, Linux Linux.

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