5.5

CVE-2022-49350

net: mdio: unexport __init-annotated mdio_bus_init()

In the Linux kernel, the following vulnerability has been resolved:

net: mdio: unexport __init-annotated mdio_bus_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 only in-tree call-site,
drivers/net/phy/phy_device.c is never compiled as modular.
(CONFIG_PHYLIB is boolean)
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.12 < 4.14.283
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.247
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.198
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.122
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.47
Linux ≫ Linux Kernel Version >= 5.16 < 5.17.15
Linux ≫ Linux Kernel Version >= 5.18 < 5.18.4
Linux ≫ Linux Kernel Version5.19 Updaterc1
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.28% 0.194
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-908 Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

https://git.kernel.org/stable/c/35b42dce619701f1300fb8498dae82c9bb1f0263
Patch
https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538
Patch
https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7
Patch
https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270c
Patch
https://git.kernel.org/stable/c/7759c3222815b945a94b212bc0c6cdec475cfec2
Patch
https://git.kernel.org/stable/c/ab64ec2c75683f30ccde9eaaf0761002f901aa12
Patch
https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755
Patch
https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3
Patch