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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-50115 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory Ignore nCR3[4:0] when loading PDPTEs from memory for nested SVM, as bits 4:0 of CR3 are ignored when PAE paging is used, and thus VMRUN doesn't enforce 32-byte alignment of nCR3. In the absolute worst case scenario, failure to ignore bits 4:0 can result in an out-of-bounds read, e.g. if the target page is at the end of a memslot, and the VMM isn't using guard pages. Per the APM: The CR3 register points to the base address of the page-directory-pointer table. The page-directory-pointer table is aligned on a 32-byte boundary, with the low 5 address bits 4:0 assumed to be 0. And the SDM's much more explicit: 4:0 Ignored Note, KVM gets this right when loading PDPTRs, it's only the nSVM flow that is broken.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/2c4adc9b192a0815fe58a62bc0709449416cc884 Patch 
https://git.kernel.org/stable/c/426682afec71ea3f889b972d038238807b9443e4 Patch 
https://git.kernel.org/stable/c/58cb697d80e669c56197f703e188867c8c54c494 Patch 
https://git.kernel.org/stable/c/6876793907cbe19d42e9edc8c3315a21e06c32ae Patch 
https://git.kernel.org/stable/c/76ce386feb14ec9a460784fcd495d8432acce7a5 Patch 
https://git.kernel.org/stable/c/f559b2e9c5c5308850544ab59396b7d53cfc67bd Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-50115
NVD Published Date:
11/05/2024
NVD Last Modified:
11/08/2024
Source:
kernel.org