Answer in brief
CVE-2026-68301 records a Unknown severity vulnerability in net: hsr: fix memory leak on slave unregistration by removing synced VLANs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=72dbae1f2f2159395089405c6c54632f2613f1be <f72c312af6c7897ab0f8a2b5a63f917a207a4143 || >=c707d2c5541d2bb94131968ad5dfeb06427a1dba <21d48408479a17eb65568a765930adea37e4d804 || >=1a8a63a5305e95519de6f941922dfcd8179f82e5 <b5ded444621b6180df9f3d4e07045fc1fc1e8cd9 || >=1a8a63a5305e95519de6f941922dfcd8179f82e5 <ae995b8002d3af134560a706c0e111a89e26317c || >=1a8a63a5305e95519de6f941922dfcd8179f82e5 <dcf15eaf5641812f1cfc5e96537380132a7da89d || 1100242709d5644856131a9dd25d32672ebe7357 || a2accc07bdcfb0c7ab2cacdca6a1fe8267816efa || >=6.6.107 <6.6.148 || >=6.12.48 <6.12.101 || >=5.15.194 <5.16 || >=6.1.153 <6.2 | f72c312af6c7897ab0f8a2b5a63f917a207a4143, 21d48408479a17eb65568a765930adea37e4d804, b5ded444621b6180df9f3d4e07045fc1fc1e8cd9, ae995b8002d3af134560a706c0e111a89e26317c, dcf15eaf5641812f1cfc5e96537380132a7da89d, 6.6.148, 6.12.101, 5.16, 6.2 |
| Linux/Linuxgeneric | 6.13 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68301 records a Unknown severity vulnerability in net: hsr: fix memory leak on slave unregistration by removing synced VLANs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=72dbae1f2f2159395089405c6c54632f2613f1be <f72c312af6c7897ab0f8a2b5a63f917a207a4143 || >=c707d2c5541d2bb94131968ad5dfeb06427a1dba <21d48408479a17eb65568a765930adea37e4d804 || >=1a8a63a5305e95519de6f941922dfcd8179f82e5 <b5ded444621b6180df9f3d4e07045fc1fc1e8cd9 || >=1a8a63a5305e95519de6f941922dfcd8179f82e5 <ae995b8002d3af134560a706c0e111a89e26317c || >=1a8a63a5305e95519de6f941922dfcd8179f82e5 <dcf15eaf5641812f1cfc5e96537380132a7da89d || 1100242709d5644856131a9dd25d32672ebe7357 || a2accc07bdcfb0c7ab2cacdca6a1fe8267816efa || >=6.6.107 <6.6.148 || >=6.12.48 <6.12.101 || >=5.15.194 <5.16 || >=6.1.153 <6.2 | f72c312af6c7897ab0f8a2b5a63f917a207a4143, 21d48408479a17eb65568a765930adea37e4d804, b5ded444621b6180df9f3d4e07045fc1fc1e8cd9, ae995b8002d3af134560a706c0e111a89e26317c, dcf15eaf5641812f1cfc5e96537380132a7da89d, 6.6.148, 6.12.101, 5.16, 6.2 |
| Linux/Linuxgeneric | 6.13 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.