CVE-2022-49350

MEDIUM EPSS 18.5%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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)

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
18.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥4.12  –  <4.14.283
linuxlinux_kernel*≥4.15  –  <4.19.247
linuxlinux_kernel*≥4.20  –  <5.4.198
linuxlinux_kernel*≥5.5  –  <5.10.122
linuxlinux_kernel*≥5.11  –  <5.15.47
linuxlinux_kernel*≥5.16  –  <5.17.15
linuxlinux_kernel*≥5.18  –  <5.18.4
linuxlinux_kernel5.19any

References 8

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

Remediation

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