CVE-2026-80736

CVE CVE-2026-80736EUVD EUVD-2026-70340Published 2026-09-03T08:21:51.000ZLast changed 2026-09-04T04:58:21.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.45; patch: 7.2; 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <d2ee4d47aacbd2ba456092eeec670dba35fde291; 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <0a8c9ed4f166216642a8c084f0de415169c88088; 6.9; patch: 6.12.104; patch: 0; 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <9977321835c7ae71d12a43bed7baa5bd514d01c3; 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 <0bfb67ba366cd68d1d0ad935760577bae1d5df27; patch: 7.1.9

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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