CVE-2026-99011 Linux Kernel Bluetooth SCO - Use After Free

Linux kernel contains a use-after-free vulnerability in Bluetooth SCO due to improper locking around sco_conn lifetime management, letting attackers cause kernel crashes or memory corruption, exploit requires Bluetooth SCO usage.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.21% 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for SCO connection lifetime serialization.

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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