Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: clear chan->ident on ECRED reconfiguration success l2cap_ecred_reconf_rsp() returns early on success without clearing chan->ident. Every other L2CAP response handler (l2cap_ecred_conn_rsp, l2cap_le_connect_rsp, l2cap_config_rsp) clears chan->ident after a successful transaction to prevent the channel from matching subsequent responses with the recycled ident value. A remote attacker that completed a reconfiguration as the peer can replay a failure response with the stale ident, causing the kernel to match and destroy the already-established channel via l2cap_chan_del(chan, ECONNRESET). Clear chan->ident for all matching channels on success, and harden the failure path by using l2cap_chan_hold_unless_zero() consistent with other L2CAP handlers (l2cap_le_command_rej, __l2cap_get_chan_by_ident).
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/00e1950716c6ed67d74777b2db286b0fa23b4be9 Patch
- git.kernel.org/stable/c/3b5b5f423b4fd23404a393bda8adba3cd6f74ef1 Patch
- git.kernel.org/stable/c/59f5ecf6ad5c4db6ae81965a96156954a3b0d89a Patch
- git.kernel.org/stable/c/8e7977afaef37c6bd2b2654f1bce6ab40d471147 Patch
- git.kernel.org/stable/c/ae0152d77d101c920769934fb102b18de0c6f526 Patch
- git.kernel.org/stable/c/c2afd2613fda90107c5e2fe8e855627451749c78 Patch
- git.kernel.org/stable/c/cc2b4f749de09975bfa06e58bbbad2f6acd4c79c Patch
- git.kernel.org/stable/c/f39049304ba655ffcbb92edbdf8c51a1f1210bed Patch
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 48 · as of 14 November 2026
- CWE
- CWE-694
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