PT-2026-61292 · Linux · Linux

CVE-2026-63975 · Published 2026-07-19 · Updated 2026-07-19

Mitre

CVSS v3.1

8.8

High

Base vector

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

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.

Fix

Related Identifiers

CVE-2026-63975

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-63975 · Security Note
• https://git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b · Note
• https://git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa · Note
• https://git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6 · Note
• https://git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479 · Note
• https://git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00 · Note
• https://git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642 · Note
• https://git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5 · Note
• https://git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48 · Note