CVE-2024-26943

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

01/05/2024

Last modified:

03/03/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	6.1 (including)	6.1.84 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.24 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.7.12 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.8 (including)	6.8.3 (excluding)
cpe:2.3:o:linux:linux_kernel:6.9:rc1::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-26943

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools