CVE-2026-90255 Linux kernel Bluetooth - Use After Free

Linux kernel Bluetooth component contains a use-after-free vulnerability caused by improper handling of SCO setup context lifetime in hci_conn, letting attackers cause memory corruption or denial of service, exploit requires Bluetooth connection manipulation.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the fix for SCO setup context lifetime.

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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