CVE-2021-47624

net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change

Description

In the Linux kernel, the following vulnerability has been resolved: net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change The refcount leak issues take place in an error handling path. When the 3rd argument buf doesn't match with "offline", "online" or "remove", the function simply returns -EINVAL and forgets to decrease the reference count of a rpc_xprt object and a rpc_xprt_switch object increased by rpc_sysfs_xprt_kobj_get_xprt() and rpc_sysfs_xprt_kobj_get_xprt_switch(), causing reference count leaks of both unused objects. Fix this issue by jumping to the error handling path labelled with out_put when buf matches none of "offline", "online" or "remove".

7.1

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cb	patch mailing list
https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0f	patch mailing list
https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18	patch mailing list

Frequently Asked Questions

What is the severity of CVE-2021-47624?: CVE-2021-47624 has been scored as a high severity vulnerability.
How to fix CVE-2021-47624?: To fix CVE-2021-47624, 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-2021-47624 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47624 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-2021-47624?: CVE-2021-47624 affects Linux Linux, Linux Linux.

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