Answer in brief
CVE-2025-68340 records a Medium severity (CVSS 5.5) vulnerability in team: Move team device type change at the end of team_port_add. 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.
Answer in brief
CVE-2025-68340 records a Medium severity (CVSS 5.5) vulnerability in team: Move team device type change at the end of team_port_add. 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.
CVSS is 5.5. 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 | >=1d76efe1577b4323609b1bcbfafa8b731eda071a <f82d1fb65549de241fe312fcb2bcb8e0ad7b424d || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <c8b15b0d2eec3b5c7f585e5a53dfc8d36c818283 || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <a74ab1b532ecc5f9106621a8f75b4c3d04466b35 || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <e26235840fd961e4ebe5568f11a2a078cf726663 || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <4040b5e8963982a00aa821300cb746efc9f2947e || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <e3eed4f038214494af62c7d2d64749e5108ce6ca || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <0ae9cfc454ea5ead5f3ddbdfe2e70270d8e2c8ef | f82d1fb65549de241fe312fcb2bcb8e0ad7b424d, c8b15b0d2eec3b5c7f585e5a53dfc8d36c818283, a74ab1b532ecc5f9106621a8f75b4c3d04466b35, e26235840fd961e4ebe5568f11a2a078cf726663, 4040b5e8963982a00aa821300cb746efc9f2947e, e3eed4f038214494af62c7d2d64749e5108ce6ca, 0ae9cfc454ea5ead5f3ddbdfe2e70270d8e2c8ef |
| Linux/Linuxgeneric | 3.7 | Not reported |
Published upstream
Dec 23, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: team: Move team device type change at the end of team_port_add Attempting to add a port device that is already up will expectedly fail, but not before modifying the team device header_ops. In the case of the syzbot reproducer the gre0 device is already in state UP when it attempts to add it as a port device of team0, this fails but before that header_ops->create of team0 is changed from eth_header to ipgre_header in the call to team_dev_type_check_change. Later when we end up in ipgre_header() struct ip_tunnel* points to nonsense as the private data of the device still holds a struct team. Example sequence of iproute2 commands to reproduce the hang/BUG(): ip link add dev team0 type team ip link add dev gre0 type gre ip link set dev gre0 up ip link set dev gre0 master team0 ip link set dev team0 up ping -I team0 1.1.1.1 Move team_dev_type_check_change down where all other checks have passed as it changes the dev type with no way to restore it in case one of the checks that follow it fail. Also make sure to preserve the origial mtu assignment: - If port_dev is not the same type as dev, dev takes mtu from port_dev - If port_dev is the same type as dev, port_dev takes mtu from dev This is done by adding a conditional before the call to dev_set_mtu to prevent it from assigning port_dev->mtu = dev->mtu and instead letting team_dev_type_check_change assign dev->mtu = port_dev->mtu. The conditional is needed because the patch moves the call to team_dev_type_check_change past dev_set_mtu. Testing: - team device driver in-tree selftests - Add/remove various devices as slaves of team device - syzbot
Quoted source text, attributed separately from HOL analysis.
CVSS is 5.5. 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 | >=1d76efe1577b4323609b1bcbfafa8b731eda071a <f82d1fb65549de241fe312fcb2bcb8e0ad7b424d || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <c8b15b0d2eec3b5c7f585e5a53dfc8d36c818283 || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <a74ab1b532ecc5f9106621a8f75b4c3d04466b35 || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <e26235840fd961e4ebe5568f11a2a078cf726663 || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <4040b5e8963982a00aa821300cb746efc9f2947e || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <e3eed4f038214494af62c7d2d64749e5108ce6ca || >=1d76efe1577b4323609b1bcbfafa8b731eda071a <0ae9cfc454ea5ead5f3ddbdfe2e70270d8e2c8ef | f82d1fb65549de241fe312fcb2bcb8e0ad7b424d, c8b15b0d2eec3b5c7f585e5a53dfc8d36c818283, a74ab1b532ecc5f9106621a8f75b4c3d04466b35, e26235840fd961e4ebe5568f11a2a078cf726663, 4040b5e8963982a00aa821300cb746efc9f2947e, e3eed4f038214494af62c7d2d64749e5108ce6ca, 0ae9cfc454ea5ead5f3ddbdfe2e70270d8e2c8ef |
| Linux/Linuxgeneric | 3.7 | Not reported |
Published upstream
Dec 23, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: team: Move team device type change at the end of team_port_add Attempting to add a port device that is already up will expectedly fail, but not before modifying the team device header_ops. In the case of the syzbot reproducer the gre0 device is already in state UP when it attempts to add it as a port device of team0, this fails but before that header_ops->create of team0 is changed from eth_header to ipgre_header in the call to team_dev_type_check_change. Later when we end up in ipgre_header() struct ip_tunnel* points to nonsense as the private data of the device still holds a struct team. Example sequence of iproute2 commands to reproduce the hang/BUG(): ip link add dev team0 type team ip link add dev gre0 type gre ip link set dev gre0 up ip link set dev gre0 master team0 ip link set dev team0 up ping -I team0 1.1.1.1 Move team_dev_type_check_change down where all other checks have passed as it changes the dev type with no way to restore it in case one of the checks that follow it fail. Also make sure to preserve the origial mtu assignment: - If port_dev is not the same type as dev, dev takes mtu from port_dev - If port_dev is the same type as dev, port_dev takes mtu from dev This is done by adding a conditional before the call to dev_set_mtu to prevent it from assigning port_dev->mtu = dev->mtu and instead letting team_dev_type_check_change assign dev->mtu = port_dev->mtu. The conditional is needed because the patch moves the call to team_dev_type_check_change past dev_set_mtu. Testing: - team device driver in-tree selftests - Add/remove various devices as slaves of team device - syzbot
Quoted source text, attributed separately from HOL analysis.