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CVE-2022-49907

21
FAUCET Score

CVE-2022-49907 is a vulnerability in the Linux kernel's network MDIO bus driver, specifically within the __mdiobus_register function. It stems from undefined behavior caused by shifting a signed 32-bit integer by 31 bits. This vulnerability carries a CVSS score of 7.8 (High), indicating a local attack vector with low complexity, potentially leading to high confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.6.28, < 4.9.333CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.10, < 4.14.299CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.15, < 4.19.265CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.20, < 5.4.224CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.5, < 5.10.154CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.20%
Probability of exploitation in next 30 days
EPSS Percentile
10.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0020 is in the 38th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2022-49907Low

kernel: net: mdio: fix undefined behavior in bit shift for __mdiobus_register

May 1, 2025

References

git.kernel.org / stable/c/20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7
Patch
git.kernel.org / stable/c/40e4eb324c59e11fcb927aa46742d28aba6ecb8a
Patch
git.kernel.org / stable/c/4954b5359eb141499492fadfab891e28905509e2
Patch
git.kernel.org / stable/c/634f066d02bdb22a26da7deb0c7617ab1a65fc9d
Patch
git.kernel.org / stable/c/6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0
Patch
git.kernel.org / stable/c/7006176a3c863e3e353ce1b8a349ef5bb1b9320e
Patch
git.kernel.org / stable/c/985a88bf0b27193522bba7856b1763f428cef19d
Patch
git.kernel.org / stable/c/a3fafc974be37319679f36dc4e7cca7db1e02973
Patch