CVE-2026-98108 Linux Kernel Bluetooth L2CAP - Out of Bounds Write

Linux kernel contains a buffer overflow caused by improper channel mode handling in Bluetooth L2CAP LE_CONN_REQ with EXT_FLOWCTL, letting attackers cause out-of-bounds write, exploit requires Bluetooth connection attempt.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.24% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Write
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
25 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

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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