CVE-2026-80736 Affecting linux-6.12 package, versions <6.12.107-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published20 Sept 2026
- disclosed3 Sept 2026
Introduced: 3 Sep 2026
NewCVE-2026-80736 (opens in a new tab)How to fix?
Upgrade Echo:latest linux-6.12 to version 6.12.107-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2026-80736
- 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