CVE-2026-89883
Description
A flaw was found in the Linux kernel's sunxi-cir module, which handles infrared remote control devices. This vulnerability occurs due to improper error handling during device initialization. If a device probe fails after the remote control (RC) device has been registered, the system does not properly unregister the device, leading to a resource leak. This could potentially allow a local attacker to exhaust system resources, resulting in a Denial of Service (DoS).
Statement
This vulnerability is rated with Moderate severity for Red Hat Enterprise Linux because exploitation requires local access on specific hardware architectures and only results in a denial of service via resource exhaustion. The affected Allwinner Consumer IR (sunxi-cir) driver is neither enabled nor built into supported Red Hat Enterprise Linux kernel packages, rendering standard production environments unaffected. Furthermore, triggering the condition upstream necessitates physical or emulated Allwinner hardware where probe failure paths can be repeatedly provoked.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Other,Confidentiality,Integrity
Technical Impact: Other; Read Application Data; Modify Application Data; DoS: Resource Consumption (Other)
It is possible to overflow the number of temporary files because directories typically have limits on the number of files allowed. This could create a denial of service problem.
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