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-2022-49339 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:

net: ipv6: unexport __init-annotated seg6_hmac_init()

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 caller (net/ipv6/seg6.c) and the callee (net/ipv6/seg6_hmac.c) belong to the same module. It seems an internal function call in ipv6.ko.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-49339

Sources (Detail)

https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90
https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290
https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755
https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c
https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a
https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e
https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a
https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0
Source Url

Alert History

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0
Date Informations
2025-02-26 17:20:32
  • First insertion