CVE-2025-38671
Description
A flaw was found in the Linux kernel's Inter-Integrated Circuit (I2C) Qualcomm Unified Peripheral (QUP) driver. A local attacker, by using a malicious or buggy I2C client, could exploit improper timeout handling. This could lead to the kernel hanging, resulting in a Denial of Service (DoS) for the affected system.
Mitigation
To mitigate this issue, if the i2c qup device is not in use, prevent the `i2c_qup` kernel module from loading. Create a file `/etc/modprobe.d/disable-i2c_qup.conf` with the content `blacklist i2c_qup`. Then, rebuild the initramfs and reboot the system for the changes to take effect. This mitigation is applicable only if i2c qup devices are not essential for system operation, as it will disable functionality related to these devices.
bash
echo "blacklist i2c_qup" > /etc/modprobe.d/disable-i2c_qup.conf
dracut -f
reboot
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 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Amplification
An infinite loop will cause unexpected consumption of resources, such as CPU cycles or memory. The software's operation may slow down, or cause a long time to respond.
Frequently Asked Questions
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