CVE-2026-63975high

Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.3%

exploitation probability

0.3%top 73% of all CVEs

observed exploitation

nono source reports it

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.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

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 https://git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5 https://git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6 https://git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48