Debian: CVE-2021-47624: linux -- security update

Debian: CVE-2021-47624: linux -- security update

Severity

6

CVSS

(AV:L/AC:L/Au:S/C:C/I:N/A:C)

Published

07/30/2024

Created

07/31/2024

Added

07/30/2024

Modified

01/30/2025

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".

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2021-47624
• CVE - 2021-47624