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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-68301 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: net: hsr: fix memory leak on slave unregistration by removing synced VLANs When an HSR master device is brought UP, it auto-adds VLAN 0 via vlan_vid0_add(), which propagates VID 0 to its slave devices (slave A and B). If a slave device is later unregistered while HSR is active (e.g., during netns cleanup or interface destruction), hsr_del_port() is called to detach the slave port from the HSR master. However, hsr_del_port() currently does not delete the VLAN IDs that were synced to the slave device by HSR. As a result, the slave device retains a refcount on VID 0 (and any other synced VLANs). When the slave device is destroyed, its vlan_info / vlan_vid_info structure remains allocated, leading to a memory leak. Fix this by calling vlan_vids_del_by_dev(port->dev, master->dev) in hsr_del_port() before unlinking slave A or slave B ports, matching the propagation logic in hsr_ndo_vlan_rx_add_vid() / hsr_ndo_vlan_rx_kill_vid() and the cleanup behavior in bonding and team drivers.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/21d48408479a17eb65568a765930adea37e4d804 kernel.org
https://git.kernel.org/stable/c/79ff0547676acdeceda445c3fce4071b0a887b70 kernel.org
https://git.kernel.org/stable/c/ae995b8002d3af134560a706c0e111a89e26317c kernel.org
https://git.kernel.org/stable/c/b5ded444621b6180df9f3d4e07045fc1fc1e8cd9 kernel.org
https://git.kernel.org/stable/c/ccc822e9e4f09a6c2ca73ad5334570441947f94f kernel.org
https://git.kernel.org/stable/c/dcf15eaf5641812f1cfc5e96537380132a7da89d kernel.org
https://git.kernel.org/stable/c/f72c312af6c7897ab0f8a2b5a63f917a207a4143 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-68301
NVD Published Date:
08/10/2026
NVD Last Modified:
08/19/2026
Source:
kernel.org