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-2022-48793

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
16/07/2024
Last modified:
07/08/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> KVM: x86: nSVM: fix potential NULL derefernce on nested migration<br /> <br /> Turns out that due to review feedback and/or rebases<br /> I accidentally moved the call to nested_svm_load_cr3 to be too early,<br /> before the NPT is enabled, which is very wrong to do.<br /> <br /> KVM can&amp;#39;t even access guest memory at that point as nested NPT<br /> is needed for that, and of course it won&amp;#39;t initialize the walk_mmu,<br /> which is main issue the patch was addressing.<br /> <br /> Fix this for real.

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:*:*:*:*:*:*:*:* 5.13 (including) 5.15.25 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.16.11 (excluding)

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


References to Advisories, Solutions, and Tools