Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2024-38543

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
19/06/2024
Last modified:
29/08/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure<br /> <br /> The kcalloc() in dmirror_device_evict_chunk() will return null if the<br /> physical memory has run out. As a result, if src_pfns or dst_pfns is<br /> dereferenced, the null pointer dereference bug will happen.<br /> <br /> Moreover, the device is going away. If the kcalloc() fails, the pages<br /> mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in<br /> kcalloc().<br /> <br /> Finally, as there is no need to have physically contiguous memory, Switch<br /> 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:*:*:*:*:*:*:*:* 5.8 (including) 6.1.93 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.33 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.8.12 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.9 (including) 6.9.3 (excluding)

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


References to Advisories, Solutions, and Tools