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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-49856 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: x86/sgx: Fix deadlock in SGX NUMA node search When the current node doesn't have an EPC section configured by firmware and all other EPC sections are used up, CPU can get stuck inside the while loop that looks for an available EPC page from remote nodes indefinitely, leading to a soft lockup. Note how nid_of_current will never be equal to nid in that while loop because nid_of_current is not set in sgx_numa_mask. Also worth mentioning is that it's perfectly fine for the firmware not to setup an EPC section on a node. While setting up an EPC section on each node can enhance performance, it is not a requirement for functionality. Rework the loop to start and end on *a* node that has SGX memory. This avoids the deadlock looking for the current SGX-lacking node to show up in the loop when it never will.


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/0f89fb4042c08fd143bfc28af08bf6c8a0197eea Patch 
https://git.kernel.org/stable/c/20c96d0aaabfe361fc2a11c173968dc67feadbbf Patch 
https://git.kernel.org/stable/c/40fb64257dab507d86b5f1f2a62f3669ef0c91a8 Patch 
https://git.kernel.org/stable/c/8132510c915815e6b537ab937d94ed66893bc7b8 Patch 
https://git.kernel.org/stable/c/9c936844010466535bd46ea4ce4656ef17653644 Patch 
https://git.kernel.org/stable/c/fb2d057539eda67ec7cfc369bf587e6518a9b99d Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-49856
NVD Published Date:
10/21/2024
NVD Last Modified:
10/23/2024
Source:
kernel.org