CVE-2021-47624

Name: CVE-2021-47624
Creator: NVD / NIST
Published: 2024-07-16T12:15:02.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2021-47624 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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".. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

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".

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS Probability

0.24%

14.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.15.24
Linux	Linux Kernel	>= 5.16, < 5.16.10

References

https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cbMailing List, Patch
https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0fMailing List, Patch
https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18Mailing List, Patch
https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cbMailing List, Patch
https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0fMailing List, Patch
https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18Mailing List, Patch

Timeline

Published: Jul 16, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-47624?

How severe is CVE-2021-47624?

CVE-2021-47624 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47624?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47624?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST