CVE-2026-90089 Linux kernel Bluetooth btnxpuart - Buffer Validation

Linux kernel Bluetooth btnxpuart contains a buffer validation vulnerability caused by missing length checks on the firmware dump header in nxp_process_fw_dump(), letting attackers cause early dump termination or read beyond buffer, exploit requires crafted truncated frames.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.33% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Validation
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for this vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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