Answer in brief
CVE-2026-80736 records a High severity (CVSS 7.8) vulnerability in thunderbolt: Fix bandwidth group reservation indexing. 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 7.8. 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 | >=52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <0bfb67ba366cd68d1d0ad935760577bae1d5df27 || >=52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <9977321835c7ae71d12a43bed7baa5bd514d01c3 || >=52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <0a8c9ed4f166216642a8c084f0de415169c88088 || >=52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <d2ee4d47aacbd2ba456092eeec670dba35fde291 | 0bfb67ba366cd68d1d0ad935760577bae1d5df27, 9977321835c7ae71d12a43bed7baa5bd514d01c3, 0a8c9ed4f166216642a8c084f0de415169c88088, d2ee4d47aacbd2ba456092eeec670dba35fde291 |
| Linux/Linuxgeneric | 6.9 | Not reported |
Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.