CVE-2022-48816 SUNRPC: lock against ->sock changing during sysfs read

2024-07-1611:44:04

Linux

github.com

linux kernel

vulnerability

sunrpc

sysfs read

oops

mutex

AI Score

6.6

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

In the Linux kernel, the following vulnerability has been resolved:

SUNRPC: lock against ->sock changing during sysfs read

->sock can be set to NULL asynchronously unless ->recv_mutex is held.
So it is important to hold that mutex. Otherwise a sysfs read can
trigger an oops.
Commit 17f09d3f619a (“SUNRPC: Check if the xprt is connected before
handling sysfs reads”) appears to attempt to fix this problem, but it
only narrows the race window.