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CVE-2026-63948

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn __set_chan_timer() tak…

Impact

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn __set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold() before scheduling the delayed work. The normal path in l2cap_chan_timeout() drops this reference with l2cap_chan_put() at the end, but the early return when chan->conn is NULL skips the put, leaking the reference. Add the missing l2cap_chan_put() before the early return.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.19.314 before 4.20
from 5.4.276 before 5.5
from 5.10.217 before 5.10.259
from 5.15.159 before 5.15.210
from 6.1.91 before 6.1.176
from 6.6.31 before 6.6.143

References