Executive Summary



This vulnerability is currently undergoing analysis and not all information is available. Please check back soon to view the completed vulnerability summary
Informations
Name CVE-2022-49726 First vendor Publication 2025-02-26
Vendor Cve Last vendor Modification 2025-02-26

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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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:

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)

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-49726

Sources (Detail)

https://git.kernel.org/stable/c/0414eab7c78f3518143d383e448d44fc573ac6d2
https://git.kernel.org/stable/c/245b993d8f6c4e25f19191edfbd8080b645e12b1
https://git.kernel.org/stable/c/937fcbb55a1e48a6422e87e8f49422c92265f102
https://git.kernel.org/stable/c/cff3a7ce6e81418b6e8bac941779bbf5d342d626
https://git.kernel.org/stable/c/db965e2757d95f695e606856418cd84003dd036d
Source Url

Alert History

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0
Date Informations
2025-02-26 17:20:29
  • First insertion