CVE-2026-98392: Bluetooth: btintel_pcie: fix tx_handle bounds off-by-one

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-14 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel_pcie: fix tx_handle bounds off-by-one Valid indices into txq->urbd0s/tfds/bufs are 0..txq->count-1, so tfd_index == txq->count is already out of range. Change the guard in btintel_pcie_msix_tx_handle() from '> txq->count' to '>= txq->count'. This issue was reported by Claude Mythos.

Affected products

Linux kernel: 6.10 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/3dd1b41f96aad08444be1b7626c89de2b9f2abd4
https://git.kernel.org/stable/c/72bbd7c815ef92399b7b109977ae4669ce22ee6e
https://git.kernel.org/stable/c/932a87444107e6724d808082676bba5c915c98ad
https://git.kernel.org/stable/c/a641201a9b4d69ee8a7ef35f7aa597dddee6b9ee

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