CVE-2026-98291

Received Received - Intake

BaseFortify

Publication date: 2026-10-06

Last updated on: 2026-10-19

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel_pcie: fix off-by-one bounds check in RX submit btintel_pcie_submit_rx() used frbd_index > rxq->count to guard the FRBD array access, allowing frbd_index == rxq->count to pass through and index one element past the end of the array. Change the check to >= rxq->count so every out-of-range index is rejected. This issue was reported by Claude Mythos.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-06

Last Modified

2026-10-19

Generated

2026-10-19

AI Q&A

2026-10-06

EPSS Evaluated

2026-10-18

NVD

CVE-2026-98291

EUVD

EUVD-2026-93219

Affected Vendors & Products

Vendor	Product	Version / Range
Linux	Linux	c2b636b3f788d10486a6691ad6dd3ec4c93bd78e
Linux	Linux	c2b636b3f788d10486a6691ad6dd3ec4c93bd78e
Linux	Linux	c2b636b3f788d10486a6691ad6dd3ec4c93bd78e
Linux	Linux	c2b636b3f788d10486a6691ad6dd3ec4c93bd78e
Linux	Linux	6.10

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a Bluetooth driver vulnerability in the Linux kernel where a bounds check in the btintel_pcie_submit_rx function allows an array index to exceed the valid range. The check incorrectly permitted frbd_index to equal rxq->count, leading to an out-of-bounds write one element past the end of the FRBD array.

Detection Guidance

This vulnerability is specific to the Linux kernel's Bluetooth subsystem, particularly the btintel_pcie driver. Detection requires checking the kernel version and examining the btintel_pcie driver code for the off-by-one error in btintel_pcie_submit_rx(). No direct network or system commands are provided in the context to detect this issue.

Impact Analysis

This vulnerability could allow an attacker to corrupt kernel memory, potentially causing system crashes, privilege escalation, or unauthorized code execution. It specifically affects systems using the btintel_pcie Bluetooth driver in the Linux kernel.

Compliance Impact

This vulnerability is a low-level Bluetooth driver issue in the Linux kernel that allows out-of-bounds array access. It does not directly impact compliance with standards like GDPR or HIPAA, as those focus on data protection and privacy rather than kernel memory safety.

Mitigation Strategies

Apply the latest kernel update that includes the fix for this vulnerability. Monitor your Linux distribution's security advisories for patches. If you are running a vulnerable kernel version, update to a patched version immediately to prevent potential buffer overflow exploits in the Bluetooth subsystem.

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