cve/2024/CVE-2024-56756.md

### [CVE-2024-56756](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56756)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=87ad72a59a38d1df217cfd95bc222a2edfe5d399%3C%20ac22240540e0c5230d8c4138e3778420b712716a%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In the Linux kernel, the following vulnerability has been resolved:nvme-pci: fix freeing of the HMB descriptor tableThe HMB descriptor table is sized to the maximum number of descriptorsthat could be used for a given device, but __nvme_alloc_host_mem couldbreak out of the loop earlier on memory allocation failure and end upusing less descriptors than planned for, which leads to an incorrectsize passed to dma_free_coherent.In practice this was not showing up because the number of descriptorstends to be low and the dma coherent allocator always allocates andfrees at least a page.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/cku-heise/euvd-api-doc