CVE-2023-52493 bus: mhi: host: Drop chan lock before queuing buffers

What is CVE-2023-52493?

CVE-2023-52493 is a medium-severity vulnerability in Linux kernel, published on 29 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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 parse_xfer_event() 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]

Weakness: CWE-667

Which versions are affected by CVE-2023-52493?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-52493?

Apply the vendor's patch.

Is CVE-2023-52493 being exploited?

There is no known exploitation of CVE-2023-52493 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-52493, DEBIAN-CVE-2023-52493, GHSA-7vjh-prmq-cfm3, UBUNTU-CVE-2023-52493.