CVE-2024-26943

medium

Description

In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: handle kcalloc() allocation failure The kcalloc() in nouveau_dmem_evict_chunk() will return null if the physical memory has run out. As a result, if we dereference src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs will happen. Moreover, the GPU is going away. If the kcalloc() fails, we could not evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL flag in kcalloc(). Finally, as there is no need to have physically contiguous memory, this patch switches kcalloc() to kvcalloc() in order to avoid failing allocations.

References

https://git.kernel.org/stable/c/9acfd8b083a0ffbd387566800d89f55058a68af2

https://git.kernel.org/stable/c/5e81773757a95fc298e96cfd6d4700f07b6192a2

https://git.kernel.org/stable/c/3e82f7383e0b82a835e6b6b06a348b2bc4e2c2ee

https://git.kernel.org/stable/c/2a84744a037b8a511d6a9055f3defddc28ff4a4d

https://git.kernel.org/stable/c/16e87fe23d4af6df920406494ced5c0f4354567b

Details

Source: Mitre, NVD

Published: 2024-05-01

Updated: 2024-05-01

Risk Information

CVSS v2

Base Score: 3.8

Vector: CVSS2#AV:L/AC:H/Au:S/C:N/I:N/A:C

Severity: Low

CVSS v3

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium