CVE-2026-74585 (GCVE-0-2026-74585)
Vulnerability from cvelistv5
Published
2026-08-22 15:31
Modified
2026-08-22 15:31
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 Version: cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6 |
||
{
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"status": "unaffected",
"version": "5.10.265",
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{
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"version": "5.15.216",
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{
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"version": "6.1.183",
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{
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{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Bound the DROM dual link port number before indexing sw-\u003eports\n\ntb_drom_parse_entry_port() validates the device-supplied header-\u003eindex\nagainst sw-\u003econfig.max_port_number before indexing sw-\u003eports[], but the\nsibling field entry-\u003edual_link_port_nr -- a 6-bit value also read from\nthe DROM -- indexes the same array with no such check. A malicious or\nmalformed Thunderbolt device can set dual_link_port_nr beyond the\nallocated sw-\u003eports[] (max_port_number + 1 entries), producing an\nout-of-bounds tb_port pointer that is stored and later dereferenced.\n\nReject a port entry whose dual_link_port_nr exceeds max_port_number,\nthe same bound already applied to header-\u003eindex."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-22T15:31:38.339Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c"
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{
"url": "https://git.kernel.org/stable/c/3d3c212b70633332ab71672aa2bc6af257d2ec83"
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{
"url": "https://git.kernel.org/stable/c/b98e1e28bd95b0fa33164eec1e763d26c7058b39"
},
{
"url": "https://git.kernel.org/stable/c/50f0c8dd8c3390f851cfb97ca13116f9ee6469d1"
},
{
"url": "https://git.kernel.org/stable/c/f28066057134aa9294caa597b670daf505ad9dce"
},
{
"url": "https://git.kernel.org/stable/c/40d2ffb74094cf36edbe05855566a4c58b6ce808"
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{
"url": "https://git.kernel.org/stable/c/f32c3a9a77cfb50934a60b05d5407649af062535"
},
{
"url": "https://git.kernel.org/stable/c/d6764992f17b23d91ff93ce905ab53c2aa7191f0"
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],
"title": "thunderbolt: Bound the DROM dual link port number before indexing sw-\u003eports",
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"cveMetadata": {
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"cveId": "CVE-2026-74585",
"datePublished": "2026-08-22T15:31:38.339Z",
"dateReserved": "2026-08-15T05:44:03.918Z",
"dateUpdated": "2026-08-22T15:31:38.339Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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