Executive Summary

Informations
Name CVE-2022-48793 First vendor Publication 2024-07-16
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-48793

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-476 NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7
Os 3504

Sources (Detail)

https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe
https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6
https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df
Source Url

Alert History

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Date Informations
2025-01-08 02:47:16
  • Multiple Updates
2025-01-07 02:46:53
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2024-12-25 02:45:40
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2024-12-12 02:48:31
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2024-11-25 09:23:51
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2024-11-21 21:22:32
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2024-11-20 02:43:22
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2024-11-14 02:43:15
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2024-11-09 02:43:54
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2024-10-26 02:41:39
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2024-10-25 02:43:25
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2024-10-23 02:42:49
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2024-10-03 02:38:53
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2024-10-02 02:37:16
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2024-09-04 02:36:39
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2024-08-22 02:35:01
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2024-08-08 00:27:49
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2024-07-16 17:27:24
  • First insertion