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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-49726 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: clocksource: hyper-v: unexport __init-annotated hv_init_clocksource() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, arch/x86/kernel/cpu/mshyperv.c is never compiled as modular. (CONFIG_HYPERVISOR_GUEST is boolean)


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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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0414eab7c78f3518143d383e448d44fc573ac6d2 kernel.org Patch 
https://git.kernel.org/stable/c/245b993d8f6c4e25f19191edfbd8080b645e12b1 kernel.org Patch 
https://git.kernel.org/stable/c/937fcbb55a1e48a6422e87e8f49422c92265f102 kernel.org Patch 
https://git.kernel.org/stable/c/cff3a7ce6e81418b6e8bac941779bbf5d342d626 kernel.org Patch 
https://git.kernel.org/stable/c/db965e2757d95f695e606856418cd84003dd036d kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-908 Use of Uninitialized Resource 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-2022-49726
NVD Published Date:
02/26/2025
NVD Last Modified:
10/24/2025
Source:
kernel.org