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.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b Patch
- git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00 Patch
- git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479 Patch
- git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa Patch
- git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642 Patch
- git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5 Patch
- git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6 Patch
- git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48 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
- 0% percentile: 20 · as of 14 November 2026
- CWE
- CWE-416CWE-667
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.