CVE-2024-56756
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix freeing of the HMB descriptor table The HMB descriptor table is sized to the maximum number of descriptors that could be used for a given device, but __nvme_alloc_host_mem…
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix freeing of the HMB descriptor table The HMB descriptor table is sized to the maximum number of descriptors that could be used for a given device, but __nvme_alloc_host_mem could break out of the loop earlier on memory allocation failure and end up using less descriptors than planned for, which leads to an incorrect size passed to dma_free_coherent. In practice this was not showing up because the number of descriptors tends to be low and the dma coherent allocator always allocates and frees at least a page.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 12th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3c2fb1ca8086eb139b2a551358137525ae8e0d7aPatch
- https://git.kernel.org/stable/c/452f9ddd12bebc04cef741e8ba3806bf0e1fd015Patch
- https://git.kernel.org/stable/c/582d9ed999b004fb1d415ecbfa86d4d8df455269Patch
- https://git.kernel.org/stable/c/6d0f599db73b099aa724a12736369c4d4d92849dPatch
- https://git.kernel.org/stable/c/869cf50b9c9d1059f5223f79ef68fc0bc6210095Patch
- https://git.kernel.org/stable/c/ac22240540e0c5230d8c4138e3778420b712716aPatch
- https://git.kernel.org/stable/c/cee3bff51a35cab1c5d842d409a7b11caefe2386Patch
- https://git.kernel.org/stable/c/fb96d5cfa97a7363245b3dd523f475b04296d87bPatch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.