CVE-2026-99013 Linux Kernel Bluetooth ISO - Use After Free

Linux kernel Bluetooth ISO contains a use-after-free vulnerability caused by concurrent BIS listener setup race condition in iso_sock_listen and iso_listen_bis, letting attackers cause stale socket access, exploit requires concurrent listen calls on the same broadcast socket.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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 concurrent BIS listener setup.

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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