CVE-2026-89774 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in Bluetooth SCO caused by improper socket reference handling in sco_conn_ready and sco_get_sock_listen, letting attackers cause memory corruption, exploit requires local access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to the latest Linux kernel version containing the fix for Bluetooth SCO socket reference handling.

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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