CVE-2026-98739
kernel: Bluetooth: RFCOMM: Fix initial port reference race
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 23, 2026
Description
A flaw was found in the Linux kernel's Bluetooth RFCOMM subsystem. A local user could exploit this flaw to cause a Denial of Service (DoS) or potentially escalate privileges. A race condition between concurrent device installation and release operations allows reference counts to be dropped prematurely, resulting in a use-after-free condition and system crash.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-825 · Expired Pointer Dereference