CVE-2026-63975

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp If dcid is received for an already-assigned destination CID the spec requires that both channels to be discarded, but calling l2cap_chan_del may invalidate the tmp cursor created by list_for_each_entry_safe and in fact it is the wrong procedure as the chan->dcid may be assigned previously it really needs to be disconnected. Calling l2cap_chan_clone directly may still lead to l2cap_chan_del so instead schedule l2cap_chan_timeout with delay 0 to close the channel asynchronously.

References

• https://git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b
• https://git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00
• https://git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479
• https://git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa
• https://git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642