CVE-2025-23151: bus: mhi: host: Fix race between unprepare and queue_buf

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-01 · updated 2026-10-15
Weakness: CWE-362

Description

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: host: Fix race between unprepare and queue_buf A client driver may use mhi_unprepare_from_transfer() to quiesce incoming data during the client driver's tear down. The client driver might also be processing data at the same time, resulting in a call to mhi_queue_buf() which will invoke mhi_gen_tre(). If mhi_gen_tre() runs after mhi_unprepare_from_transfer() has torn down the channel, a panic will occur due to an invalid dereference leading to a page fault. This occurs because mhi_gen_tre() does not verify the channel state after locking it. Fix this by having mhi_gen_tre() confirm the channel state is valid, or return error to avoid accessing deinitialized data. [mani: added stable tag]

Affected products

Debian Linux: 11.0
Linux kernel: from 5.15.149 before 5.15.181; from 6.1.76 before 6.1.135; from 6.6.15 before 6.6.88; from 6.7.3 before 6.12.24; from 6.13 before 6.13.12; from 6.14 before 6.14.3 — fixed in 5.15.181, 6.1.135, 6.12.24, 6.13.12, 6.14.3, 6.6.88

How to fix

Upgrade to a fixed version: Linux kernel 5.15.181, 6.1.135, 6.12.24, 6.13.12. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-23151 or the next vulnerability affects your stack