Description
In the Linux kernel, the following vulnerability has been resolved:
thunderbolt: Bound the DROM dual link port number before indexing sw->ports
tb_drom_parse_entry_port() validates the device-supplied header->index against sw->config.max_port_number before indexing sw->ports[], but the sibling field entry->dual_link_port_nr -- a 6-bit value also read from the DROM -- indexes the same array with no such check. A malicious or malformed Thunderbolt device can set dual_link_port_nr beyond the allocated sw->ports[] (max_port_number + 1 entries), producing an out-of-bounds tb_port pointer that is stored and later dereferenced.
Reject a port entry whose dual_link_port_nr exceeds max_port_number, the same bound already applied to header->index.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < 6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < 3d3c212b70633332ab71672aa2bc6af257d2ec83; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < b98e1e28bd95b0fa33164eec1e763d26c7058b39; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < 50f0c8dd8c3390f851cfb97ca13116f9ee6469d1; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < f28066057134aa9294caa597b670daf505ad9dce; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < 40d2ffb74094cf36edbe05855566a4c58b6ce808; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < f32c3a9a77cfb50934a60b05d5407649af062535; >= cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6, < d6764992f17b23d91ff93ce905ab53c2aa7191f0 |
| Linux | Linux | 3.17 |
References
- https://git.kernel.org/stable/c/3d3c212b70633332ab71672aa2bc6af257d2ec83
- https://git.kernel.org/stable/c/40d2ffb74094cf36edbe05855566a4c58b6ce808
- https://git.kernel.org/stable/c/50f0c8dd8c3390f851cfb97ca13116f9ee6469d1
- https://git.kernel.org/stable/c/6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c
- https://git.kernel.org/stable/c/b98e1e28bd95b0fa33164eec1e763d26c7058b39
- https://git.kernel.org/stable/c/d6764992f17b23d91ff93ce905ab53c2aa7191f0
- https://git.kernel.org/stable/c/f28066057134aa9294caa597b670daf505ad9dce
- https://git.kernel.org/stable/c/f32c3a9a77cfb50934a60b05d5407649af062535
Timeline
- Published
- Aug 22, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Received