CVE-2026-80736thunderbolt: Fix bandwidth group reservation indexing
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 8 days later
· 8 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 – < 0bfb67ba366cd68d1d0ad935760577bae1d5df27
- affected 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 – < 9977321835c7ae71d12a43bed7baa5bd514d01c3
- affected 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 – < 0a8c9ed4f166216642a8c084f0de415169c88088
- affected 52a4490e89d7c4effe613d8dffd2ac0a2a786bd7 – < d2ee4d47aacbd2ba456092eeec670dba35fde291
- affected 6.9
- unaffected < 6.9
- unaffected 6.12.104 – ≤ 6.12.*
- unaffected 6.18.45 – ≤ 6.18.*
- unaffected 7.1.9 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/0bfb67ba366cd68d1d0ad935760577bae1d5df27 (opens in a new tab)
- https://git.kernel.org/stable/c/9977321835c7ae71d12a43bed7baa5bd514d01c3 (opens in a new tab)
- https://git.kernel.org/stable/c/0a8c9ed4f166216642a8c084f0de415169c88088 (opens in a new tab)
- https://git.kernel.org/stable/c/d2ee4d47aacbd2ba456092eeec670dba35fde291 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-70340 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80736)Record last updated .