CVEvulnerability
CVE-2026-63948
- Status
- Undergoing Analysis
- Published
- 2026-07-19
- Last modified
- 2026-07-27
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
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.
References
- https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd git.kernel.org
- https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f git.kernel.org
- https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee git.kernel.org
- https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1 git.kernel.org
- https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2f git.kernel.org
- https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939 git.kernel.org
- https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060 git.kernel.org
- https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917b git.kernel.org