CVE-2026-68301
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.
How to fix
- Linux Linuxccc822e9e4f09a6c2ca73ad5334570441947f94f, 79ff0547676acdeceda445c3fce4071b0a887b70, f72c312af6c7897ab0f8a2b5a63f917a207a4143, 21d48408479a17eb65568a765930adea37e4d804, b5ded444621b6180df9f3d4e07045fc1fc1e8cd9, ae995b8002d3af134560a706c0e111a89e26317c, dcf15eaf5641812f1cfc5e96537380132a7da89d, 5.15.216, 6.1.183, 6.6.148, 6.12.101 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1100242709d5644856131a9dd25d32672ebe7357 ≤ v < ccc822e9e4f09a6c2ca73ad5334570441947f94f, a2accc07bdcfb0c7ab2cacdca6a1fe8267816efa ≤ v < 79ff0547676acdeceda445c3fce4071b0a887b70, 72dbae1f2f2159395089405c6c54632f2613f1be ≤ v < f72c312af6c7897ab0f8a2b5a63f917a207a4143, c707d2c5541d2bb94131968ad5dfeb06427a1dba ≤ v < 21d48408479a17eb65568a765930adea37e4d804, 1a8a63a5305e95519de6f941922dfcd8179f82e5 ≤ v < b5ded444621b6180df9f3d4e07045fc1fc1e8cd9, 1a8a63a5305e95519de6f941922dfcd8179f82e5 ≤ v < ae995b8002d3af134560a706c0e111a89e26317c, 1a8a63a5305e95519de6f941922dfcd8179f82e5 ≤ v < dcf15eaf5641812f1cfc5e96537380132a7da89d, 5.15.194 ≤ v < 5.15.216, 6.1.153 ≤ v < 6.1.183, 6.6.107 ≤ v < 6.6.148, 6.12.48 ≤ v < 6.12.101, 6.13 | ccc822e9e4f09a6c2ca73ad5334570441947f94f, 79ff0547676acdeceda445c3fce4071b0a887b70, f72c312af6c7897ab0f8a2b5a63f917a207a4143, 21d48408479a17eb65568a765930adea37e4d804, b5ded444621b6180df9f3d4e07045fc1fc1e8cd9, ae995b8002d3af134560a706c0e111a89e26317c, dcf15eaf5641812f1cfc5e96537380132a7da89d, 5.15.216, 6.1.183, 6.6.148, 6.12.101 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.