CVE-2023-52493: bus: mhi: host: Drop chan lock before queuing buffers
In the Linux kernel, the following vulnerability has been resolved:
bus: mhi: host: Drop chan lock before queuing buffers
Ensure read and write locks for the channel are not taken in succession by dropping the read lock from parsexferevent() such that a callback given to client can potentially queue buffers and acquire the write lock in that process. Any queueing of buffers should be done without channel read lock acquired as it can result in multiple locks and a soft lockup.
[mani: added fixes tag and cc'ed stable]
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2023-52493?
CVE-2023-52493 has been rated as a medium-severity vulnerability in the Linux kernel.
How do I fix CVE-2023-52493?
To mitigate CVE-2023-52493, upgrade the Linux kernel to the fixed versions such as 5.10.223-1 or 6.1.123-1.
Which versions of the Linux kernel are affected by CVE-2023-52493?
CVE-2023-52493 affects Linux kernel versions between 5.7 and 5.10.210, 5.11 and 5.15.149, 5.16 and 6.1.76, 6.2 and 6.6.15, and 6.7 and 6.7.3.
What is the nature of the vulnerability in CVE-2023-52493?
CVE-2023-52493 involves a locking issue in the MHI (Mobile Hardware Interface) subsystem of the Linux kernel.
Is there a specific version to upgrade to if I'm running Linux kernel version 5.10.x?
If you are running Linux kernel version 5.10.x, you should upgrade to version 5.10.223-1 or later to address CVE-2023-52493.