CVE-2026-80736

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Fix bandwidth group reservation indexing Valid bandwidth group IDs range from 1 through MAX_GROUPS, while Group ID 0 is reserved. tb_consumed_dp_bandwidth() uses the Group ID directly to index its local group_reserved[] array. The array currently has MAX_GROUPS entries, so its valid indices are 0 through MAX_GROUPS - 1. Group ID MAX_GROUPS therefore accesses one element past the end, and the final group's reserved bandwidth is not included when the array is summed. Give group_reserved[] MAX_GROUPS + 1 entries so direct Group ID indexing covers the reserved ID 0 and valid IDs 1 through MAX_GROUPS.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0a8c9ed4f166216642a8c084f0de415169c88088
https://git.kernel.org/stable/c/0bfb67ba366cd68d1d0ad935760577bae1d5df27
https://git.kernel.org/stable/c/9977321835c7ae71d12a43bed7baa5bd514d01c3
https://git.kernel.org/stable/c/d2ee4d47aacbd2ba456092eeec670dba35fde291

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-03 13:06

Updated : 2026-09-04 05:17

NVD link : CVE-2026-80736

Mitre link : CVE-2026-80736

CVE.ORG link : CVE-2026-80736

JSON object : View

Products Affected

No product.

CWE

No CWE.

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