CVE-2026-68301

CVE CVE-2026-68301EUVD EUVD-2026-55402Published 2026-08-10T12:02:35.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux c707d2c5541d2bb94131968ad5dfeb06427a1dba <21d48408479a17eb65568a765930adea37e4d804; 1a8a63a5305e95519de6f941922dfcd8179f82e5 <ae995b8002d3af134560a706c0e111a89e26317c; 5.15.194 <5.16; 6.13; patch: 6.6.148; 6.12.48 <6.12.101; 1100242709d5644856131a9dd25d32672ebe7357; 72dbae1f2f2159395089405c6c54632f2613f1be <f72c312af6c7897ab0f8a2b5a63f917a207a4143; patch: 7.2-rc5; a2accc07bdcfb0c7ab2cacdca6a1fe8267816efa; patch: 0; 6.6.107 <6.6.148; 6.1.153 <6.2; patch: 6.18.42; 1a8a63a5305e95519de6f941922dfcd8179f82e5 <dcf15eaf5641812f1cfc5e96537380132a7da89d; 1a8a63a5305e95519de6f941922dfcd8179f82e5 <b5ded444621b6180df9f3d4e07045fc1fc1e8cd9; patch: 6.12.101; patch: 7.1.6

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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