CVE-2026-63948
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cdPatch
- https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508fPatch
- https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51eePatch
- https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1Patch
- https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2fPatch
- https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939Patch
- https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060Patch
- https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917bPatch