CVE-2022-48793
KVM Linux Kernel NULL Pointer Dereference Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: nSVM: fix potential NULL derefernce on nested migration Turns out that due to review feedback and/or rebases I accidentally moved the call to nested_svm_load_cr3 to be too early, before the NPT is enabled, which is very wrong to do. KVM can't even access guest memory at that point as nested NPT is needed for that, and of course it won't initialize the walk_mmu, which is main issue the patch was addressing. Fix this for real.
INFO
Published Date :
July 16, 2024, 12:15 p.m.
Last Modified :
Aug. 7, 2024, 7:22 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-48793.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2022-48793 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-48793 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 07, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe No Types Assigned https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe Patch Changed Reference Type https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6 No Types Assigned https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6 Patch Changed Reference Type https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df No Types Assigned https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df Patch Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13 up to (excluding) 5.15.25 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.16.11 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 16, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: KVM: x86: nSVM: fix potential NULL derefernce on nested migration Turns out that due to review feedback and/or rebases I accidentally moved the call to nested_svm_load_cr3 to be too early, before the NPT is enabled, which is very wrong to do. KVM can't even access guest memory at that point as nested NPT is needed for that, and of course it won't initialize the walk_mmu, which is main issue the patch was addressing. Fix this for real. Added Reference kernel.org https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-48793 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-48793
weaknesses.