Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Avoid cacheline sharing for DMA buffer Depending on the architecture the transfer buffer may share a cacheline with the following mutex. As the buffer may be used for DMA, that is problematic. Use the high-level DMA helpers to make sure that cacheline sharing can not happen. Also drop the comment, as the helpers are documentation enough. https://sashiko.dev/#/message/20260408175814.934BFC19421%40smtp.kernel.org A flaw was found in the Linux kernel’s hwmon (powerz) component. This vulnerability is caused by cacheline sharing between the transfer buffer and a mutex during Direct Memory Access (DMA) operations. This architectural issue can lead to unexpected behavior or data corruption, impacting system stability. The flaw is addressed by using high-level DMA helpers to prevent cacheline sharing.Details
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Debian 13 | Planned | — |
| Ubuntu 24.04 | Planned | — |