CVE-2026-23164
Unknown Unknown - Not Provided
Memory Leak in Linux Kernel Rocker Port Component Fixed

Publication date: 2026-02-14

Last updated on: 2026-03-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: rocker: fix memory leak in rocker_world_port_post_fini() In rocker_world_port_pre_init(), rocker_port->wpriv is allocated with kzalloc(wops->port_priv_size, GFP_KERNEL). However, in rocker_world_port_post_fini(), the memory is only freed when wops->port_post_fini callback is set: if (!wops->port_post_fini) return; wops->port_post_fini(rocker_port); kfree(rocker_port->wpriv); Since rocker_ofdpa_ops does not implement port_post_fini callback (it is NULL), the wpriv memory allocated for each port is never freed when ports are removed. This leads to a memory leak of sizeof(struct ofdpa_port) bytes per port on every device removal. Fix this by always calling kfree(rocker_port->wpriv) regardless of whether the port_post_fini callback exists.
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Meta Information
Published
2026-02-14
Last Modified
2026-03-18
Generated
2026-06-16
AI Q&A
2026-02-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23164
EUVD
EUVD-2026-5873
Affected Vendors & Products
Showing 13 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.11 (inc) to 5.15.199 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.162 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.123 (exc)
linux linux_kernel 6.19
linux linux_kernel From 6.7 (inc) to 6.12.69 (exc)
linux linux_kernel 6.19
linux linux_kernel From 6.13 (inc) to 6.18.9 (exc)
linux linux_kernel From 4.6 (inc) to 5.10.249 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
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Mitigation Strategies

The vulnerability is a memory leak in the Linux kernel's rocker driver related to the rocker_world_port_post_fini() function.

To mitigate this vulnerability, update your Linux kernel to a version where this issue is fixed. The fix ensures that the allocated memory for rocker_port->wpriv is always freed regardless of whether the port_post_fini callback exists.

Compliance Impact

I don't know

Detection Guidance

I don't know

Executive Summary

This vulnerability is a memory leak in the Linux kernel's rocker driver. Specifically, in the rocker_world_port_pre_init() function, memory is allocated for rocker_port->wpriv. However, in the rocker_world_port_post_fini() function, this allocated memory is only freed if a certain callback (port_post_fini) is set.

Since the rocker_ofdpa_ops does not implement this port_post_fini callback (it is NULL), the allocated memory for each port is never freed when ports are removed. This causes a memory leak of the size of struct ofdpa_port bytes for every port on every device removal.

The fix involves always freeing the allocated memory regardless of whether the port_post_fini callback exists.

Impact Analysis

This vulnerability can lead to a memory leak in the Linux kernel when ports are removed in the rocker driver. Over time, repeated device removals without freeing the allocated memory can cause increased memory usage, potentially leading to system instability or degraded performance.

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