PT-2025-8284 · Linux+3 · Linux Kernel+3

Stephen Rothwell · Published 2022-06-06 · Updated 2025-09-29 · CVE-2022-49350

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved, related to the mdio bus init() function being annotated with init while also being exported as a symbol. This combination is problematic because the .init.text section is freed after initialization, and modules cannot use symbols annotated with init, potentially leading to a kernel panic. The issue was previously undetected by modpost due to a decade-long bug but was recently identified after modpost was fixed.

Recommendations Remove EXPORT SYMBOL from the mdio bus init() function to prevent the vulnerability, as the only in-tree call site in drivers/net/phy/phy device.c is never compiled as modular.

Exploit

Fix

Use of Uninitialized Resource

Improper Initialization

Weakness Enumeration

CWE-908

CWE-665

Related Identifiers

ALSA-2025_16880

BDU:2026-03496

CVE-2022-49350

OESA-2025-1336

RHSA-2024:2394

RHSA-2024_2394

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Suse

References · 1363

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49350.json · Exploit
• https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538 · Patch
• https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49350 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49243 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-49350 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49335 · Security Note
• https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270c · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49381 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49490 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755 · Patch
• https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47659 · Security Note