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

hwmon: (asus_rog_ryujin) Validate HID report lengths

rog_ryujin_raw_event() parses response headers and payload fields without
first checking that they are present in the received report. A short report
can therefore make the driver consume uninitialized bytes from the HID
transport buffer and expose them as sensor values through sysfs.

Validate the response header and the fields used by each response type
before parsing them.
Published: 2026-09-25
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Immediate Patch
AI Analysis

Impact

The affected Linux kernel driver reads fields from HID reports without first validating that the report contains the expected data. When a short report is received, the driver consumes uninitialized bytes from the HID transport buffer and surfaces them as sensor values through the sysfs interface. This flaw allows an attacker to gain unintended visibility into kernel memory contents, potentially exposing sensitive data and compromising confidentiality. The vulnerability is an example of improper handling of uninitialized data (CWE-908).

Affected Systems

The flaw resides in the ASUS ROG Ryujin driver that is part of the Linux kernel. Any Linux installation that includes this driver, regardless of specific kernel version, is potentially impacted. The affected modules reference the Linux:Linux vendor and product family, with no explicit version constraints provided in the CNA data.

Risk and Exploitability

Exploitation requires local access to the system or control over the HID device to supply crafted reports, so it is a local threat vector. The EPSS score of <1% and the CVSS score of 5.5 reflect a moderate likelihood of exploitation and moderate severity. The vulnerability is not listed in the CISA KEV catalog, indicating a low likelihood of widespread exploitation. Although the CVSS score indicates moderate impact on confidentiality, the risk remains moderate for systems that expose the raw sensor data via sysfs to untrusted users.

Generated by OpenCVE AI on October 1, 2026 at 10:55 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply a kernel update that includes the patch for the ASUS ROG Ryujin driver.
  • If an update is not available, blacklist or unload the rog_ryujin module to prevent it from loading and exposing the vulnerable sysfs entries.
  • Implement monitoring of sysfs sensor output for unexpected or anomalous values to detect potential exploitation.

Generated by OpenCVE AI on October 1, 2026 at 10:55 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 29 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-908
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Fri, 25 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: hwmon: (asus_rog_ryujin) Validate HID report lengths rog_ryujin_raw_event() parses response headers and payload fields without first checking that they are present in the received report. A short report can therefore make the driver consume uninitialized bytes from the HID transport buffer and expose them as sensor values through sysfs. Validate the response header and the fields used by each response type before parsing them.
Title hwmon: (asus_rog_ryujin) Validate HID report lengths
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-25T10:21:36.208Z

Reserved: 2026-09-24T16:01:01.153Z

Link: CVE-2026-97538

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-25T11:17:04.080

Modified: 2026-09-25T11:17:04.080

Link: CVE-2026-97538

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-25T00:00:00Z

Links: CVE-2026-97538 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T11:00:06Z

Weaknesses
  • CWE-908

    Use of Uninitialized Resource