CVE-2026-23164
Description
A flaw was found in the rocker component of the Linux kernel. This memory leak vulnerability allows a local attacker with low privileges to repeatedly add and remove ports. This action prevents memory from being properly freed, leading to memory exhaustion and a denial of service (DoS) on the system.
Statement
A MODERATE impact memory leak flaw exists in the rocker component of the Linux kernel. A local attacker with low privileges can exploit this by repeatedly adding and removing ports, leading to memory exhaustion and a denial of service. This affects Red Hat Enterprise Linux 7, 8, 9, 10 and Red Hat In-Vehicle OS 2. Red Hat Enterprise Linux 6 is not affected as the vulnerable code is not present.
Mitigation
If the `rocker` kernel module is not required for system operation, it can be prevented from loading to mitigate this vulnerability. To blacklist the `rocker` module, create a configuration file:
echo "blacklist rocker" | sudo tee /etc/modprobe.d/blacklist-rocker.conf
After creating the file, regenerate the initramfs and reboot the system for the changes to take effect. This may impact functionality if the `rocker` module is actively used by network devices.
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 (Other); DoS: Resource Consumption (Memory); DoS: Resource Consumption (CPU)
An attacker that can influence the allocation of resources that are not properly released could deplete the available resource pool and prevent all other processes from accessing the same type of resource. Frequently-affected resources include memory, CPU, disk space, power or battery, etc.
Frequently Asked Questions
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